De Sesmaisons (2014), p. 575. De Sesmaisons, François (2014), "Cette Chine que J'Aime..." Jean de Guébriant, Missionaire Breton au Siècle des Missions, Saint-Denis: Publibook. (in French)
Andersson (1943), p. 40. Andersson, J.G. (1943), "Researches into the Prehistory of the Chinese", Bulletin, No. 15, Stockholm: Museum of Far Eastern Antiquities, pp. 1 ff.
"5A级景区", Official site, Beijing: China National Tourism Administration, 7 Nov 2017, archived from the original on 2008-09-05, retrieved 2017-11-12. (in Chinese)
"5A级景区", Official site, Beijing: China National Tourism Administration, 7 Nov 2017, archived from the original on 2008-09-05, retrieved 2017-11-12. (in Chinese)