I Suppress the Dragon's Veins in the Human World

My name is Chen Wang, I am 23 years old. I graduated from both universities with one degree. I have a deposit of 8,000 in Beidiao in two years. I was optimized by the third company last month. The day my grandpa passed away, I was revising my resume in the rental house. The call came from a neighbor from my hometown: "Your father hasn't been out for three days. We climbed over the wall and went in, and he was already cold." I rushed back to that small eighteenth-tier county town overnight. Pushing open the door of the old house, Grandpa was sitting on the master's chair in the main room, with a faded red cloth covering his face and a crumpled yellow paper in his hand. There were only two sentences written on the paper: "Wangzi, our family has not been poor for eight lifetimes, but has been guarded for eight lifetimes." "It's your turn to watch what's under the ground." At the time, I just thought the old man was confused. Until I dug out a tin box under his bed. There was no bankbook or house book in the box, only half a burnt sheepskin map, a bronze key that was so rusted that its shape could not be seen, and a wooden sign with the words "Chen's Dimai Master" engraved on it. The sign was stained with blood and hadn't dried yet. --- I didn't sleep that night and looked at the half-sheet of the sheepskin picture in front of the flashlight on my phone for half the night. The picture shows a map of China, but it is not what it looks like now. The mountains, rivers and rivers are all in the right place, but there are more than a dozen lines that I have never seen before - they start from the Kunlun Mountains and spread like blood vessels to all parts of the country. What's even weirder is that there are nine red dots on the picture. One of them is marked right below the county seat of my hometown. There is a line of small words next to it, so blurry that it is almost unclear: "The Nine Cauldrons govern China. The cauldron is there, and the mountains and rivers are there. The cauldron is lost——"