If it is Guangxi, Yunnan, Guangdong and Hainan provinces, it is true that the regular tourism companies in these provinces have all signed up for the tour. I come from Nanning, Guangxi, and I have good friends who are tourists. I have this special discount during the off-season in Vietnam. However, such a cheap group will have to choose its own expenses, but it is not expensive. Around 200 yuan.
Vietnam's national economic conditions are not very good. The place to live is definitely not better than China, that's for sure.