As far as I know, "Hao Qing" is an indoor mobile phone application, which can help users run indoors. This application provides a variety of indoor running modes and training plans, and users can choose the appropriate mode and plan according to their own running needs. Besides running indoors, Haoguang also supports other kinds of indoor sports, such as indoor fitness and indoor cycling. Therefore, if you want to run indoors, "Haoguang" should be a good choice.