Through analysing the biggest bussinssman at sea in China in the 17th Century, Mr Zheng s sea-trade activities,this article discussed the various social effects on both sides of the strait by opening to navigation and trade contacts between them,as it is very important to both and even to this area,the whole southeast and west and east.

Water trade restriction and water resources management under free trade system;

Research on the Free Trade and Sustainable Development Go to Realization from Contradictory Conflict to Coordinate Development;

Is There a Paradox between the Free Trade Theory and Anti-dumping Rules;

The theories of trade freedom and protection are not diametrically opposed.

Environmental protection is the problem that GATT and WTO begin to pay attention to under the condition that the international voice of environmental protection rises increasingly, sustainable development has become a purpose of WTO, and trade freedom is the essential goal of the system of GATT/WTO .

The coordination of environmental protection and trade liberalization is a new issue in the multilateral trade system.

Imperfect legal system of striking false products, and international free trade, analyzing the causes of false products, and at last offering countermeasure and proposals for the harmfulness of false products.