Tusun Jelly. [Photo provided to chinadaily.com.cn]

Tusun Jelly is a well-known Chinese style of cookies in Xiamen. Sea worm, literary "sipunculid", is a type of worm found in muddy seabed. Before the cooking, the sea worm should be washed thoroughly to remove the guts and sand. When the worm is tenderly cooked, the pectin of it mixes with the water and finally turns into a type of jelly. It is extremely refreshing and tasty.