The test sites in the whole country are basically the same. But there are exceptions. For example, mathematics in Shanghai is a little different from that in most areas, and English in Guangdong is also different from that in other areas. The more difficult papers in China are: physics in Beijing and Chengdu, mathematics in Hangzhou, Wuhan, Chengdu and Harbin.
The test sites in all provinces are the same, except for some provincial papers, such as Anhui, Henan and Hebei. Most provinces are their own propositions, but the difficulty is different. Like 13 cities in Jiangsu, the papers in Nantong, Nanjing, Suzhou and Wuxi are more difficult, while those in Yangzhou, Suqian and Huai 'an are relatively simple.