Hydrangea Island is also known as Tea Island because all the tea is grown on the island. The landmark building on Hydrangea Island in Tianmu Lake is a purple sand ladle pot named "the first pot in the world". It has been certified by Guinness and Shanghai. It is the largest purple sand ladle pot in the world up to now. It is 3.5 meters high, 1.8 meters inside diameter and 2.7 cubic meters containing water. It took more than 7 months for more than 10 craftsmen to make it with 1.5 tons of good purple sand clay, because it was made in 2000. Year, so it is also called "the pot of the century".