Question: What is the name of the unofficial grouping of elite universities that are part of the C9 Leaugue?

Context paragraphs:
C9 League: The C9 League is an official alliance of nine elite and prestigious universities in mainland China, initiated by the Chinese Central Government through Project 985 to promote the development and reputation of Chinese higher education system by founding world-class universities in the 21st century.  It is analogous to the Ivy League in the United States, the U15 in Canada, the Golden Triangle in the UK, and the Go8 in Australia.  The members of the C9 League are Tsinghua University, Peking University, Zhejiang University, Nanjing University, Fudan University, Shanghai Jiao Tong University, Xi'an Jiaotong University, University of Science and Technology of China and Harbin Institute of Technology.  Together they account for 3% of the country's researchers but receive 10% of national research expenditures.  They produce 20% of the nation's academic publications and 30% of total citations.

Oxbridge: Oxbridge is a "portmanteau" (composite word) of "Oxford" and "Cambridge", both elite universities in the United Kingdom.  The term is used to refer to them collectively, both in contrast to other British universities and more broadly to describe characteristics reminiscent of University of Oxford and University of Cambridge, often with implications of superior social or intellectual status.

Vigilance committee (trade union): A vigilance committee is an unofficial grouping within a trade union, formed for the purpose of putting pressure on that union's leadership to pursue alternative policies or to pursue existing policies with increased vigour.  Vigilance committees are usually formed when large numbers of union members disagree with the union's official policy, believe that they cannot trust the leadership to protect their interests properly, or that it is necessary for union members to scrutinise the actions of the leadership.  In the United Kingdom, vigilance committees were widespread during the 1920s, appearing, for example, amongst seamen, dockers and railwaymen.  These vigilance committees were influenced by communist militants of the National Minority Movement.  Vigilance committees were also common in 1940s or 1950s, although by this stage most such bodies did not use the term vigilance committee, preferring alternate terms such as "Reform Movement".

Golden triangle (universities): The "golden triangle" is an unofficial grouping of elite universities located in the English cities of Cambridge, London and Oxford, as listed below:

Executive education: Executive education (Exec.  Ed) refers to academic programs at graduate-level business schools worldwide for executives, business leaders and functional managers.  These programs are generally non-credit and non-degree-granting, but sometimes lead to certificates. Estimates by "Business Week" magazine suggest that executive education in the United States is approximately an $800 million annual business with approximately 80 percent provided by university-based business schools.  Key players in university-based executive education span elite universities, as well as many regional and mid-sized universities and business schools around the world.

Yield protection: Yield protection (commonly referred to as Tufts syndrome) is an alleged admissions practice where a university or academic institution rejects or wait-lists highly qualified students on the grounds that such students are bound to be accepted by more prestigious universities or programs.  However, alternate theories regard the yield protection as a myth propagated by college students who failed to gain admission to elite universities.

Dongfeng High School: Dongfeng High School, whose short name is "Dong Gao" and "Dongfeng No.1 High School", is located in Shiyan City, Hubei Province, China, People's republic.  It is highly recognized provincial wise and state wise, with reputation of exporting excellent graduates into many elite Universities in China and abroad.

Compatriots Club: The Compatriots Club was an unofficial grouping of British Conservatives between 1904 and 1914.  According to E. H. H. Green, the Club "was made up of a membership of Conservative MPs, academics, journalists, and writers, functioned as a form of ‘think tank’ to generate Conservative ideas on the economy, imperial relations, defence, and other issues".  Members included William Cunningham, William Hewins, William Ashley, Lord Milner, Leo Amery, John Waller Hills and Arthur Steel-Maitland.

Todd Joseph Miles Holden: Todd Joseph Miles Holden (also known as T.J.M. Holden and Todd Holden) is an American-born social scientist, essayist, philosopher, and novelist.  He was the first tenured foreign professor at Tohoku University, one of Asia’s elite universities, where he taught for 26 years.  His scholarship has been multi- and trans-disciplinary, embracing globalization, media studies, cultural studies, semiotics, advertising, television, Japanese popular culture, sociology, cultural anthropology, political communication, gender, identity, and digital youth.  Between 2000 and 2009 he was a contributor to the international webzine PopMatters, writing a regular column on Japanese popular culture called "ReDotPop", and creating "PM"’s first blog, "Peripatetic Postcards".  In 2011 he published a book by the same name, bearing the subtitle "the journey of life through 25 of the world's cities".  Recent work has included literary treatments of the 2011 Tōhoku earthquake and tsunami, dystopia, philosophical detection, comedy and caper.

Platform for Transparency: Platform for Transparency was a loose unofficial grouping within the European Parliament, established in 2005, for three MEPs who are not affiliated to an official European political party.

Supporting paragraphs: C9 League Golden triangle (universities)
Answer: The "golden triangle"