State Council of the People's Republic of China, Provisions of the State Council concerning the encouragement of investment in developing Hainan… (1991)
“ Article 20 When coming to Hainan Island to negotiate investment or trade, promote economic and technological exchange, visit relatives or to tour, foreigners from countries or regions having diplomatic relations or official trade links with China, may apply for entry visas at the port of Haikou or Sanya if their stay in Hainan does not exceed 15 days; those who need to stay in Hainan longer or who want to go on to other parts of China on justifiable grounds, may apply for an extension of visa or obtaining an additional visa endorsement according to relevant provisions. ”
