QS and U.S. News Five-Year Rankings Deep Dive: What Actually Happened at PolyU (2021–2027)

Seven years, 25 places — that is the distance PolyU has travelled in the QS World University Rankings, from 75th to 50th. Over the same period, in the U.S. News ranking — which ignores reputation surveys entirely and compares only papers and citations — PolyU vaulted from 100th to 52nd in three editions, a leap of 48 places. The two curves look like different routes to the same destination, but each was powered by a different engine: one rode the dividend of a "change of measuring stick," the other on the genuine substance of publications and citations. This is a single-institution deep dive: it covers PolyU alone, no five-way comparison. The portal version asks "which of Hong Kong's five universities rose and which fell"; this site asks "what actually happened at PolyU over these five years that made two different measuring sticks both lift it higher." We break the rankings back down into their indicators, map each indicator to verifiable events at the University itself (the Chang'e-6 payload, SHTM's unbroken run at No. 1, the growth in Highly Cited Researchers), and finally go subject by subject, year by year, to see which disciplines really carried world-class rankings.

To read this article, you only need to hold onto one thing: QS and U.S. News do not measure the same thing. PolyU is 50th in QS and 52nd in U.S. News; the numbers look close, but the closeness is a coincidence — Section 3 below takes the "two measuring sticks" apart in detail.

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# Section 1 · What exactly do the rankings measure? — Where PolyU scores on each table

# How is QS 50th calculated? Where is PolyU strong and weak across the 9 indicators?

Answer: The QS World University Rankings are a composite of nine weighted indicators, nearly half of which are reputation surveys. PolyU's strengths are its No. 1 in Hong Kong for "International Research Network," No. 3 in Hong Kong for "Citations per Faculty," and No. 3 in Hong Kong for "Sustainability"^※ (all figures per the QS 2026 edition, released June 2025). Its perennial weaknesses are the absolute values of "Faculty Student Ratio" and "Academic Reputation," which lag behind the older comprehensive universities.

The indicators and weights QS has used since the 2024 edition are set out below. To understand PolyU's ranking, the key is to see where it is near full marks and where it is structurally held back.

The "International Research Network" indicator deserves special attention. It measures a university's ability to build and sustain research partnerships across regions; QS defines it officially^※ as measuring "how successful an institution has been at establishing and maintaining research partnerships with institutions in other regions." Hong Kong universities collaborate internationally at very high density, so almost all of them score well here; PolyU is No. 1 in Hong Kong. This detail is the key to understanding why Hong Kong universities rose collectively after 2025, which Section 2 covers.

# How is U.S. News 52nd calculated? What is the fundamental difference from QS?

Answer: All 13 indicators of the U.S. News Best Global Universities ranking are based entirely on paper and citation data from Clarivate's Web of Science^※ (the 2026–2027 edition uses a 2020–2024 publication window), with no subjective student satisfaction metrics at all; even the two reputation indicators ask about "research reputation." So PolyU's 52nd place here is, in essence, a composite of "publication volume + citation quality + international collaboration."

One sentence separates the two tables: QS is nearly half reputation survey plus internationalisation plus staff-student ratio; U.S. News compares nothing but the volume and quality of papers and citations. For the same PolyU, QS asks "what do others think of you, and how international are you," while U.S. News asks "how much have you published, how much have you been cited, and how much of it ranks in the global top 10% / top 1%." That is why the two trajectories below are told separately — each rise comes from a different side of the University working hard.

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# Section 2 · The five-year trajectory, year by year: why has PolyU been climbing all the way?

# What does PolyU's seven-year QS trajectory look like? Why was the "holding steady" of 2024 actually the most critical year?

Answer: PolyU has risen year after year in the QS World University Rankings, from 75th in the 2021 edition to 50th in the QS 2027 edition^※ (released June 2026) — seven consecutive record highs. The most misread of these years is QS 2024: that year QS overhauled its methodology (the change of measuring stick), and HKU, HKUST, CityU and CUHK all dropped in one go — PolyU alone bucked the trend and held at 65th. That is the real starting point of PolyU's current climb.

Thread 1 · The change of measuring stick. The QS 2024 edition (released June 2023) was QS's biggest methodological overhaul in twenty years: three new indicators — Sustainability, Employment Outcomes and International Research Network — each at 5%; Academic Reputation cut from 40% to 30%; Faculty Student Ratio cut from 20% to 10%; Employer Reputation raised from 10% to 15%; Citations per Faculty unchanged at 20%. The change dealt a one-off blow in QS 2024 to most Hong Kong universities, which relied heavily on academic reputation and staff-student ratios — but PolyU, because of its applied positioning (the higher weight on employer reputation helps it, and the lower weight on staff-student ratio lightens the load on its weak spot), held at 65th in the same gust. So when reading PolyU's QS curve, do not mistake "not falling in 2024" for mediocrity — it is the evidence that PolyU rode out the change of measuring stick.

Why could it climb consecutively after 2025? Half the answer is that the new indicators favour Hong Kong universities; the other half is genuine gains in reputation and citations:

• International Research Network is the structural reason for the collective rise of Hong Kong universities — Hong Kong institutions collaborate internationally at very high density and score near full marks, and PolyU is No. 1 in Hong Kong; this indicator only began counting in 2024, which amounts to a "methodology dividend" for Hong Kong universities.
• Sustainability has become a new pillar for PolyU in recent years (No. 3 in Hong Kong in QS 2026), reinforced by the rise of its green and sustainable technology disciplines.
• Citations per Faculty at No. 3 in Hong Kong sits on a real growth in Highly Cited Researchers and highly cited papers (see the U.S. News section of Section 2 and the driving events in Section 4).

# Why did PolyU leap 48 places in three editions of U.S. News?

Answer: PolyU went from 100th globally in the 2024 edition of U.S. News Best Global Universities (released October 2023)^※, to 58th in the 2025–2026 edition^※, to 52nd in the 2026–2027 edition^※ — a jump of 48 places across three editions. In between, the 2024–2025 edition saw the University as a whole leap to 67th in the world^※ (a single-year rise of 33 places).

Thread 2 · Pure bibliometrics. All 13 U.S. News indicators come from papers and citations in Clarivate's Web of Science (a rolling five-year window; the 2026–2027 edition uses the 2020–2024 publication window), counting only three document types: articles, notes and reviews^※, with no student satisfaction component whatsoever. So the rise in PolyU's curve here was won 100% in the contest of papers and citations, and has nothing to do with admissions, teaching or campus experience. Three drivers explain it:

• Research volume and citations-per-paper rising in tandem: publication output and field-normalised citation impact have climbed steadily, lifting several indicators at once.
• A rising share of highly cited papers: PolyU's engineering and materials papers are especially dense in the "world's most cited top 10% / top 1%" — and U.S. News's percentage-based indicators (top 10% share at 10%, top 1% share at 5%) are particularly kind to a "small but excellent" system, which PolyU exactly is.
• International collaboration as an advantage: the two collaboration indicators together carry 10%, and Hong Kong, as a highly internationalised research system, naturally scores well — PolyU more than most.

This is precisely why PolyU's engineering disciplines shine so brightly on the U.S. News subject tables: in the 2024–2025 edition Civil Engineering was 2nd in the world, Engineering 5th, and Mechanical Engineering 6th^※, with 17 subjects in the global top 50 and 8 subjects ranking first in Hong Kong. The advantage in papers and citations is laid bare most clearly at the subject level.

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# Section 3 · Why can't we say "the two tables agree" when PolyU is 50th in QS and 52nd in U.S. News?

Answer: The closeness of these two ranks is pure coincidence; the two tables measure different things, and so it is the norm, not the exception, for the same university to be far apart on the two tables. PolyU happens to sit at about 50th on both, but that does not mean the two measuring sticks have "aligned" — the comparison below explains why the two ranks should not be averaged.

Reading this table explains the "contradictory-looking" ranks among Hong Kong universities: the same institution is often dozens of places apart on QS and U.S. News — HKUST, for instance, is 33rd in QS but 82nd in U.S. News, while CUHK is 28th in U.S. News yet 18th in QS. This is not a contradiction; it is two measuring sticks measuring different things: QS is nearly half reputation survey plus internationalisation plus staff-student ratio, U.S. News is pure publication and citation volume. PolyU sits at about 50th on both because its "research has volume (helps U.S. News) + internationalisation and employer reputation are both strong (helps QS)" — two flanks pulling at once, not one table being flattered by a lopsided strength.

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# Section 4 · Which institutional events really drove the rankings? — Mapping indicators to verifiable facts

Rankings are results; events are causes. Below, the abstract notions of "rising citations per faculty" and "rising research reputation" from the two threads of Section 2 are mapped to verifiable events at PolyU. This section is also where this site's history/research columns and rankings columns meet — read these events and you read the University behind the rankings.

# The Chang'e-6 lunar far-side sampling: how does a national-level breakthrough lift engineering research reputation?

Answer: PolyU is the only Hong Kong university to have its own self-developed key payload on the Chang'e-6 mission^※. The "surface sampling execution device" developed by Professor Yung Kai-leung's team helped achieve humanity's first lunar far-side sampling in June 2024; in 2025 the mission team (led by the China National Space Administration) received the IAF World Space Award at the 76th International Astronautical Congress. Breakthroughs of this national scale directly lift research reputation and media exposure in engineering and aerospace, and are felt in both the QS Academic Reputation survey and the U.S. News research reputation survey.

This is no isolated event. Since 2010 PolyU has taken part in the Chang'e-3/4/5/6 missions and the Tianwen-1 Mars mission, developing the "Mars Camera" (used to monitor the Zhurong rover) and terrain-mapping technology — a long record of national space contributions that has built a deep foundation of reputation for engineering and remote sensing. The site's research column tells the full arc of this space thread.

# The growth of Highly Cited Researchers: how does PolyU push its citation indicators up?

Answer: The number of PolyU scholars named Clarivate Highly Cited Researchers has climbed steadily^※: 15 in 2023 → 16 in 2024 → 21 in 2025. Highly Cited Researchers directly improve indicators such as citations per paper, the H-index, and the top-1% highly cited share — helping both QS's "Citations per Faculty" (No. 3 in Hong Kong) and the large block of bibliometric items in U.S. News.

The same trend runs through top scientists at scale: in 2024, 232 PolyU scholars were named among Stanford's "World's Top 2% Scientists"^※ (career-impact list), and 355 in total when the single-year-impact list is added. Citation indicators do not rise out of thin air; they correspond to these nameable cohorts of scholars and papers.

# SHTM and internationalisation: how do a flagship discipline and collaboration networks lift the whole University?

Answer: PolyU's School of Hotel and Tourism Management (SHTM) has been No. 1 in the world for "Hospitality & Tourism Management" in the Shanghai Ranking's GRAS for nine consecutive years^※ (it won the discipline in 2017, the year the category was first established, and has held the top spot ever since) — the University's most internationally iconic world-leading discipline, and it anchors PolyU in the global top 15 for hospitality in QS. On internationalisation: in the 2023/24 academic year PolyU ran more than 330 recruitment events in some 40 countries, saw non-local undergraduate applications rise by about 50%, and took up the rotating chairmanship of the University Alliance of the Silk Road — these feed directly into QS's "International Research Network" (No. 1 in Hong Kong) and the international faculty/student indicators.

The table below aligns the events of Section 4 with the indicators they affect, so the "event → indicator → ranking" transmission can be seen at a glance:

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# Section 5 · Subject-level trends: which disciplines actually carried the world-class rankings?

An overall rank of 50th is a composite; PolyU's true world-class strength hides in the subject tables. By the official QS subject-ranking reckoning, PolyU had 5 subjects in the global top 30, 24 in the top 100, and 4 subjects ranked first in Hong Kong in the 2026 edition^※; the 2025 edition saw 7 subjects in the top 30 and 26 in the top 100^※. The five subject peaks — Hospitality & Leisure Management (steadily in the world's top 15), Civil & Structural Engineering (No. 1 in Hong Kong, world's top 20), Nursing (jumped into the top 20 in the last two years; the fastest riser), Architecture & Built Environment (long-term top 25), and Art & Design (No. 1 in Hong Kong) — along with their host faculties, their year-by-year ranks across editions, and why these five subjects in particular, are covered in depth in a deep dive into the five world-top-30 subjects; the full cross-comparison of the four subject-ranking systems is in subject rankings.

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# Further reading (within this site)

• World comprehensive rankings — the full picture of QS / THE / ARWU / U.S. News institutional ranks and the methodological debates.
• Subject rankings — complete figures for each world-class subject, rank by rank, across years.
• Research breakthroughs — the full stories behind the events that drive the rankings: the Chang'e payload, the Mars Camera, the Highly Cited Researchers, and more.