Liang Wenfeng wasn't trying to raise $7 billion. DeepSeek's first ever funding round was supposed to be symbolic. $300 million at a $10 billion valuation, just enough to issue employee equity so ByteDance and Xiaomi would stop walking off with the lab's researchers. That target is now $7.35 billion. The valuation: $50 billion. The lead investor: China's semiconductor strategic fund. The China Integrated Circuit Industry Investment Fund, the "Big Fund," is the vehicle Beijing has used since…