Good morning, Bay Area, and welcome to mid-August. Peak travel season is now upon us, and flights between the U.S. and China are set to double from current levels by the end of October as the countries relax restrictions put in place during the pandemic. As such, United Airlines said late Friday that it will resume daily flights between San Francisco International Airport and Beijing in November and increase service to Shanghai with daily nonstops from SFO, starting Oct. 1. Reporter Mark Calvey has…