Because Chongming Island here is a trademark, not a place name.

The "Chongming Island" trademark has been registered for various products, with a total of 308 trademarks. Among them, the rice trademark was registered in 2005.

There is actually a clause in the Trademark Law that, in principle, a place name above a certain county level cannot be registered as a trademark, but there is an exception. If it has been registered, it can be used as an exception. Of course, this may itself There will be different understandings. Generally, it should be due to historical reasons. Registered place names can continue to exist as trademarks.

Chongming soil resources:

The soil in Chongming District includes three soil types: paddy soil, fluvo-aquic soil and saline soil, as well as 8 soil genera and 35 soil species. The thickness of the soil tillage layer is generally 3 to 5 inches. The three soil types are distributed in strips extending from east to west and arranged from north to south.

Paddy soil is mainly distributed in Haiqiao, Sanxing, Hehe, Miaozhen, Jiangkou, Gangxi, Chengqiao and other townships, as well as Aoshan, Xinhe, Shuhe, Baozhen, Wuliang, Xianghua, Ji The area south of the Nanhengyin River line in Bang, Chenjia Town and other townships accounts for 49.87% of the collective cultivated land in the region.