China wants American firms to invest more in its old industrial base of Jilin province, which borders both Russia and North Korea, to help rejuvenate the state-dominated region amid growing tensions between Beijing and Washington.Dozens of corporate executives from the United States attended a round-table discussion in Jilin’s capital, Changchun, on Thursday. A total of 55 American companies were represented, including the likes of GE, Honeywell and Cargill.Ning Jizhe, vice-chairman of the…