Chinese stocks fell on Tuesday, taking little comfort from a slew of support measures unleashed by Beijing in recent days, and unnerved by Chinese Premier Li Keqiang’s failure to mention the market chaos in a statement on the economy. Before the market opened, Li said in comments posted on a government website that China had the confidence and ability to deal with challenges faced by its economy, but had nothing to say on the three-week plunge that has knocked around 30 percent off Chinese shares since mid-June.