Complex sentence: Also, there is a tradition that people would go to climb the Huangqi Mountain in the lunar New Year.So during the Spring Festival, the roads near the Huangqi Mountain would be jammed with slow moving traffic because many people would go there.
Split into simpler sentences: Also, there is a tradition that people climb the Huangqi Mountain in the lunar New Year. Therefore, during the Spring Festival, the roads near the Huangqi Mountain are jammed with slow moving traffic because many people go there.