China faces significant challenges advancing its semiconductor lithography, a key hurdle for its drive toward technological self-sufficiency and superiority in the trade war with the US.Shanghai Micro Electronics Equipment Group Co., the country’s leading provider of such technology, has been able to carve out only a 4% share of the market for older-generation lithography, according to the Center for Security and Emerging Technology. The DC-based independent think tank is often consulted by vari...