The China Region field is used to store province, city, and district/county information for China.
The data source for this field type comes from Administrative-divisions-of-China.
In the main NocoBase interface, go to "Plugin Manager", find the "China Region Field" plugin, and enable it.
After enabling the plugin, you can add a "China Region" type field in the collection configuration.

In a form, you can select the province, city, and district/county in a cascading manner.

Storage Format
110101.Beijing/Beijing/Dongcheng District.{"province":{"code":"110000","name":"Beijing"},"city":{"code":"110100","name":"Beijing"},"area":{"code":"110101","name":"Dongcheng District"}}.Display Format
110101.Beijing/Beijing/Dongcheng District.Default Value
You can set a default province, city, and district/county.