SHANGHAI—A handful of local COVID-19 cases in eastern parts of China have prompted Shanghai city to limit tourism activities and a nearby city to cut public transport services, as the Chinese regime insists on zero tolerance against letting clusters spread. National health officials had said earlier this month that China’s aim was not to remain at zero infections but to make sure local clusters were detected and contained as quickly as possible. Shanghai has suspended travel agencies from organizing tourism that involves trips between the city and other province-level regions. The financial hub of 24.9 million residents has sealed up a few residential compounds deemed of higher infection risk, and a number of local hospitals have halted some face-to-face services to comply with COVID-19 control. Beijing city’s annual marathon was canceled, its organizing committee said on Friday, citing concerns of virus transmission risk, without referring to the latest cases. The …