You can dig snails everywhere. In Panyu, Guangzhou, in some streams, only those with gravel can dig more snails. There is also the small river near the sea on the other side of Gull Island. When the tide goes out, there will be many snails under the stone foundation at the edge of the river. There is no need to dig at all, just buckle them with your hands. My classmates in Gull Island asked me to touch it before. You can touch a lot in less than an hour.