Hidden Dragon Secret 3: the Strange Tomb of Mang Mountain

The story tells that when "I" and Ma Liu were browsing the stalls in the Nanguo Antique City, we accidentally met Lao Zhang from Shanxi. During the conversation, we learned that Lao Zhang had a family heirloom that he wanted to sell. And this family heirloom turned out to be a several-inch-large Yin-Yang gourd made of gloomy wood and golden silk, which was extremely valuable. When asked about the origin, Lao Zhang told the legend of the treasure hidden in Mang Mountain. Just when Ma Liu and I were planning to go treasure hunting in Mang Mountain, Guan Ling suddenly invited us to congratulate Guangu Mountain on his birthday. Ma Liu and I then went to Guan's house and unexpectedly met several archaeological team members. The leader was an archeology professor named Tang Tiansheng, and another professor named Chen Guowen. There were also two students, one named Xiao Jian and the other Mu Xiaoting. And their purpose coincides with ours. They are all interested in the treasures in Mang Mountain. Professor Tang originally wanted to invite Guan Gushan to help find the ancient tombs in Mang Mountain, but Guan Gushan recommended Ma Liu and me to Professor Tang because of his old age. I was well aware of the dangers of Mang Mountain, so I had no choice but to rope in Guan Ling, who knew the "grave-piercing technique", and agreed to Professor Tang's invitation to lead everyone to Mang Mountain to search for the tomb. Since the yin-yang gourd came from Mang Mountain, in order to find out its origin, I gave it to Guan Gushan Zhang Zhangyan. After learning that this yin-yang gourd was worn by Yang Gong, the founder of Feng Shui, the cunning Guan Gushan actually wanted to buy it at a low price. I tried to refute it in every possible way on the grounds that it was a relative's heirloom, and Ma Liu even offered a sky-high price, hoping to force Guan Gushan to retreat. But what he didn't expect was that Guan Gushan actually used Guan Ling as a bargaining chip in exchange for the Yin and Yang Gourd. The next day, Ma Liu, Guan Ling and I once again joined hands and led the archaeological team to Mang Mountain to search for the tomb. But before departure, a foreign archaeological expert named Mina joined in...