The Dutch ship Witte Paert which sailed to Nagasaki, Japan from Anping, carried 54,700 pieces of ordinary deer skin and 2,000 pieces of large deer skin, with still 30,000 pieces more awaiting shipment at Anping. The Jacht de Sperwer sailing from Anping to Japan on July 29 of the same year sank near the Chi Chou Island (濟州島), with a load, among other things, of 19,952 pieces of deer skin, 3,000 pieces of large deer skin, 3,078 pieces of goat skin, and 920 piculs of sugar.
1963 May, Cheng-siang Chen [陳正祥], “Foreign Trade”, in Taiwan: An Economic and Social Geography, volume I, number 96, Taipei: Weiwen Press Co., Ltd., page 609