Tourists enjoy boating in a scenic area in Xingyi, Guizhou province. LIU CHAOFU/FOR CHINA DAILY The rising trend toward 'micro vacations' is prompting innovation in the tourism sector, Yang Feiyue reports. Like many others, the fluctuating domestic COVID-19 situation has been a perpetual source of frustration for Shuai Chengrui every time he tries to take time off to embark on …