domestic sales mainly cover the following provinces and cities:
beijing, harbin, tianjin, xi'an, qingdao, nanjing, hefei, shanghai, nanchang, changsha, wuhan, chongqing, xiamen, guangzhou, shenzhou, hong kong
the international sales field mainly covers the following areas:
products are exported to france, the united kingdom, germany, italy, saudi arabia, the united arab emirates, the united states, canada, japan and south korea and other countries
