There are also two astronomical scientific instruments in Tianning Temple in Changzhou, which are unique among the temples in China. It is placed on both sides of Danyong in the Hall of Ursa Major, with a stone tablet on the east side, which is called "face-to-face sundial"; The first thing in the west that looks like a countertop is called a "flat sundial". It can read out the time and solar terms according to the fan-shaped line diagram of the sun shining on the wall. It was designed in the 25th year of Jiaqing (1820) by Zhang Zuonan, a historian and former magistrate of Yanghu Lake (now Changzhou and Wujin), using the principle of astronomical calendar and absorbing the advantages of the European sundial introduced to China in the late Ming Dynasty, according to the latitude of Changzhou. According to experts' research, this kind of sundial is rare among the existing ancient sundials in China, so it was included in the Catalogue of Ancient Astronomical Instruments in China, which is also a unique treasure of Tianning Temple.
Tennoja, these words were inscribed by Zhao Puchu, the former vice chairman of Chinese People's Political Consultative Conference, the former president of the Chinese Buddhist Association and a famous contemporary calligrapher. There is also a unique brick carving on it, which was edited by imperial academy Feng Guifen in Qing Dynasty.