Traveling Domestically in China Post-Pandemic

With international travel not possible for foreigners living in China, some have felt that their travel options are somewhat limited, with many avoiding travel all together. However, domestic travel has been an option for several months now, but many are still unsure about what it would be like traveling in China post-COVID. What do you need to do? Is it possible to travel wherever you want? What loops with you need to jump through in order to do so.