Recently, the hit dramas Ren Yu (The Mermaid) and Zhongqi (Heavy Duty) have been drawing viewers, with danmaku comments flooding in asking "Where is this?" and "Please give the address." The answer points to one small city – Jiajiang. The factory buildings and dormitories from the Third Front construction era, such as the 909 Red Education Base and the Jiajiang Water Works, are remarkably well preserved, carrying the natural "patina" of time – making them a recognized natural film set for production crews. When you visit Leshan, take a stroll through Jiajiang. In the same old streets and factories you've seen on screen, you can read the past and present of this city.