What's the difference between the first round and the second round?

The difference is that the number of architectural disciplines is different.

1, the number of construction disciplines is different: in the first round, the number of engineering disciplines in China is the largest, involving 35 disciplines, of which materials science and engineering are the most involved disciplines, with 30 universities joining the construction, followed by science, with a total of 16 disciplines, in which the number of chemical disciplines is slightly reduced, while in the second round, the number of engineering disciplines in China has increased, especially the emerging interdisciplinary disciplines such as integrated circuit science and engineering.

2. Double first-class universities refer to world-class universities and universities with first-class disciplines, referred to as "double first-class". There are 137 double-class universities in China, including 42 first-class universities and 95 first-class disciplines. Among the 42 first-class universities, 36 are Class A universities and 6 are Class B universities.