A free port, Macao is a trade, tourist, and fishing center, but gambling casinos account for most of its GDP. There are also textile, clothing, electronics, footwear, and toys industries. Most of Macao's transit trade with China is by way of its shallow harbor on the west side of the peninsula. Tourism, mainly for gambling, is extremely important to the province, with many coming from nearby Hong Kong and the mainland. Restrictions on foreign investment in casinos were lifted in 2001, and by 2006 Macao had exceeded Las Vegas in total money gambled. There is daily ferry and bus service to Guangzhou and ferry, hydrofoil, and helicopter service to Hong Kong. Taipa is connected to Macao city by bridges. An airport opened in 1995.