There are three types of tenkoku (seal carving), one of which is very rare, with different characters carved on the top and bottom, and another word faintly carved on the side. First, the large tenkoku is a white-letter seal of Wu Changshuo's "Cheng Qing Yin Xin," with a seal face of 2.5 x 2.5 cm and a length of 6.6 cm. Next is the rare one, carved with "Xi Fang Zhi Min" (People of the West), and "Horse" is carved on the opposite side. Please see the photo for the characters on the side. The size is 1.5 x 1.5 cm and the length is 4.5 cm. The last tenkoku is "Dao Wu Heng Jing" (No Shortcut), 1.5 x 1.5 cm and 4 cm long.