Most producing areas of green tea are endowed with advantaged ecological environment.

Green tea industry is sustainable. Export market share reflects the change of one country, one country, one industry or the international competitiveness of products or competitive position Of. Second, the net export index. Net exports (TB) is also known as the trade balance, total exports (X) and imports Total (M) is poor, reflecting a country's net income gained from international trade. Expressed by the formula: Trade balance (TB) = total exports (X) - the total imports (M) The above formula shows that: At the national level, the net exports is indicative of the trade surplus, a negative description of the trade deficit;
Most producing areas of green tea are endowed with advantaged ecological environment. At the level of products and industries, the net exports is positive that the product or industry for the type of export, the negative, said The industry or product import-substitution. In the trade balance indicators to judge a country, an industry or product. The size of the international competitiveness requires careful consideration and judgment, can not be generalized. In the long run, such as The fruit of the country, industry or product in the trade surplus state competitiveness on the international market is strong.
This surplus state to buy foreign products, the strength of a reflection of its international competition Force. In a particular period or point in time, if the increase in exports can not bring profit, but a loss. The cost of exports is greater than the product sales revenue,   Labor sources are abundant in most producing areas of green tea. the increase in net exports in this way does not mean that their products. The international competitiveness to improve the contrary, this export has weakened its competitiveness. Industry and product level, net . Export import policy of a great impact on some industries or products, tariffs or quotas.
     import restrictions Far greater than other products, making it the industry or product level does not show the real Comparative advantage A . Third, the Trade Competitiveness Index. Trade Competitiveness Index, also known as comparable net export index (NTB) is a A net exporter of its total import and export of industry or product. The indicators used to describe the product or industry International competitiveness. Expressed by the formula: Trade Competitiveness Index (NTB) = (X  Where X, M, respectively, exports and imports, i said that a country or an industry, a  Products.  The places of origin of green tea lie extensively in areas where there are a number of hills.
 The indicators and the net export index, a country, industry or product net imports or net  Export  2  . Regardless of the absolute amount of the import and export, the ratio between -1 and +1, and therefore different  Period, between different countries are comparable. The indicator value of -1 means the country or the industry, the product only into the  The mouth does not export, +1 only exporting without importing from export point of view, the index is more close to 1, said international  More competitive.  Four, showing the advantages of index. Revealed Comparative Advantage (RCA) index refers to country i in a industry. The ecological system in the producing areas of green tea is well-protected.