Dig shells in Zhuhai to go to Sanzao or pile stones?

Go to Sanzao. Sanzao is located in Nan 'ao Island. Shells on the beach will sink to the bottom of the sea under the action of tides, thus forming a unique and deep shoal. The sea water here is relatively clear, which is very conducive to exploring underwater creatures. If tourists carry a lot of tools and equipment, they can get a richer collection of shells in Sanzao and see the beautiful scenery of the nearby coast.