The Liu Ding Mountains are east-west, with six peaks undulating, with the highest peak at 603 meters above sea level. From here, a mountain extends to the southeast. On both sides of the mountain are cemeteries, and more than 80 stone chambers seal the soil foundation. 1948, the tomb of Princess Hui Zhen (the second daughter of the third generation of Wang Daqin Mao) was cleared, and pottery, jade area, Jin Yong steel ornaments and tombstones were unearthed. The inscription is shaped like a laurel, 90 cm high, 49 cm wide and 29 cm thick. It has 265,438+0 lines, Chinese characters are engraved on intaglio, and there are more than 700 real regular script characters. This stone tablet was carved in 780 AD. The inscription proves that Bohai uses Chinese characters, is popular in parallel prose, is proficient in calligraphy, and is of great value. The stone tablet is engraved with seaweed and cirrus patterns. At the same time, two stone lions were unearthed, which were vigorous in shape and vigorous in image, indicating that the culture of the Tang Dynasty had a far-reaching influence on the Bohai Sea and had penetrated into its cultural life and daily life.