it's the old tricks for foreign companies to pay real salary abroad and pay only "生活费" in China...
Similiar way for MNC to 避税by overstated cost for materials brought from abroad and "paid" low prices for products manufactured in their own factories in China.
Read many news report that China's 税务局,海关take various measures to tackle such 避税methods, wonder how come it could still be doing so for we ordinary sea turtles?