Introduction to the Black Tiger Palace: There is a Millennium Platycladus arborvitae in the Black Tiger Palace. The tree is 3 meters in circumference and 26 meters high. It was planted during the Sui and Tang Dynasties and is 1,500 years old. In 1936, the tree was struck by lightning, and some of its branches withered, but new branches later sprouted and are still green. The top of the arborvitae is like a phoenix spreading its wings, and the bottom is like a dragon circling.