Different use areas of volume 1 and volume 2.
(1) The provinces currently used in Volume I are: Henan, Hebei, Shanxi, Shaanxi (Chinese and Comprehensive), Hubei (Comprehensive), Jiangxi (Comprehensive), Hunan (Comprehensive), Jiangxi (Chinese and Mathematical English) and Shandong (English).
(2) The provinces currently used in Volume II are Guizhou, Gansu, Guangxi, Qinghai, Tibet, Heilongjiang, Jilin, Ningxia, Inner Mongolia, Xinjiang, Yunnan, Liaoning (comprehensive), Hainan (Chinese and Mathematical English), Liaoning (Chinese and Mathematical English), Chongqing and Sichuan (comprehensive).
Difficulty of each subject in National Volume I and National Volume II
There is basically no difference in the difficulty of Chinese, National Volume I and National Volume II.
The objective questions in Mathematics, National Volume 1 and National Volume 2 all belong to sub-topics. Although the questions are different, the difficulty is roughly the same.
English, the difference between the two is obvious, and it can be seen from the difficulty of listening that it is more difficult to take the national exam.
Generally speaking, the first volume of physics in China is very difficult to do, and the average examinee can only get about 70 points. It is not easy to get to 72, but the second volume of the country can be easily answered.