Promo trailer is now online (via Deadline) for Birth of the Dragon starring Billy Magnussen, Xia Yu, Philip Ng, Jinging Qu, and Xing Jing.Set against the backdrop of San Francisco’s Chinatown, this cross-cultural film chronicles Bruce Lee’s emergence as a martial-arts superstar after his legendary secret showdown with fellow martial artist Wong Jack Man.It's amazing to think of what Bruce Lee accomplished — and when.