It's because most of the most famous dinosaurs in China were found in Zigong City, Sichuan Province. The number is small, but it is a fine product. Zigong Dinosaur Museum is located there.

The dinosaur fossils unearthed in Zigong City, Sichuan Province include famous dinosaur fossils such as Yongchuan Dragon, Heping Chinese Pirates Dragon, Jianshe Qilong, Tuojiang Dragon, Huayang Dragon, Emei Dragon, Yandulong, Yangmen Xilong, Hechuan Mamen Xilong and Giant Spinosaur.

Extended information:

Sichuan Zigong Dinosaur Museum:

Zigong Dinosaur Museum is located in the northeast of Zigong City, Sichuan Province, 11 kilometers away from the city center.

It is a large-scale site museum built on the world-famous "Dashanpu dinosaur fossil site". It is another large-scale site museum in China after Banpo Site and Terracotta Warriors Pit. It is also the first professional dinosaur museum in China and one of the three largest dinosaur site museums in the world.

The museum covers an area of more than 66, square meters, and its collection of fossil specimens includes almost all known dinosaur species in the Jurassic period 21-145 million years ago, making it one of the places with the largest collection and display of Jurassic dinosaur fossils in the world.

was rated as "the best dinosaur museum in the world" by National Geographic magazine.

reference source: Baidu encyclopedia-the hometown of dinosaurs.