Welcome. Premium G-SHOCK stores mainly located in big cities such as Beijing, Shanghai, along with all kinds of CASIO shops running by authorized dealers. You can also find shops in small cities but their sku is limited due to the dealers ranking.
Asked this on your other video about this watch as well, but just in case someone sees it here, do you know anywhere that is selling this watch? All of the listings I was looking up got sold within the last few months :(