Entrepreneurs of the Song Dynasty

The protagonist Qin Changyi just graduated from a key university. After returning to his hometown, he unexpectedly discovered a black hole in time and space that can travel back and forth infinitely, and came to a different Song Dynasty. At first, Qin Changyi just wanted to go there and have fun, but because he had no money, he pawned some items he had brought from modern times and got his first pot of gold. He originally wanted to use the first pot of gold to start a good career in the Song Dynasty, but he did not want to be involved in the struggle between local wealthy businessmen, but was also forced to be involved in the struggle between the Song Dynasty royal family and wealthy businessmen from all over the country. In order to survive stably in the Song Dynasty, continue to obtain property from the Song Dynasty, and become a successful entrepreneur in the Song Dynasty, what choice will Qin Changyi make?