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In international trade, import and export of all countries establish quality of the Tie Guan Yin Tea / Ti Kwan Yin Tea tea inspection, supervision and administration institutions.

The development of tea inspection and evaluation with  Iron Goddess of Mercy Tea the origin of tea drinking evolution is closely and promote each other. China early in the tang and song dynasties, there is on the quality of tea quality, authenticity identification of the tie guan yin tea 1929. The fragrance of the Tie Guan Yin Tea / Ti Kwan Yin Tea lantian, lu CaiXiang record “, “tea HuangRu” tea to the record of all the evaluation of tea as described and summarized. 18th century, along with  Iron Goddess of Mercy Tea the development of world tea trade, operator and prosperity to get high profits, the wind of ZuoWei bowls YeHang adulteration. It reflects a strong, consumers, importing countries governments have to import ban fake tea legislation. 1725 years, the British government issued the first tea doping ban statute; 1766 added “offenders in prison sanctions” of the Tie Guan Yin Tea / Ti Kwan Yin Tea act. In 1883, the United States congress banned first through the pseudo tea mixed input statute; In 1897 congress prohibited the second through the doping and bad tea input statute; In 1911 the United States government banned trade and inspection again issued a closer relationship, tea inspection become tea trade inalienable important component.

More than 100 years, both in content and tea inspection on a new depth of continuous development. Countries to traditional, it is also the main quality evaluation method of the Tie Guan Yin Tea / Ti Kwan Yin Tea evaluation methods of tea senses widely studied. Including the conditions, the evaluation of the dragon well tea evaluation office appliance, review tea tea tea procedures, water, evaluation factors main quality factor and the importance, evaluation of tea terms, grading methods, joggling sample methods, such as real standard sample tea, making it more scientific and standard, improve the accuracy of the Tie Guan Yin Tea / Ti Kwan Yin Tea sensory evaluation, comparability and importance.

The evaluation method in improving the senses, while in the 1950s onwards, from  Iron Goddess of Mercy Tea all countries carried out extensively chemical evaluation research, tea tea physical properties and discussed various effective chemical composition analysis of tea, the content of the Tie Guan Yin Tea / Ti Kwan Yin Tea data to seek from  Iron Goddess of Mercy Tea measuring chemical evaluation method to identify the quality of tea quality to replace sensory evaluation. Chinese tea universities, research units, import and export commodities inspection agency respectively departments such as the shape of tea successively ore-search capacity, the tea than color, testing the water extract, caffeine, crude fiber this amount, tea polyphenols, catechin total, total theaflavins and tea red element content, amino acid amount, tea acid content and red broken tea quality aspects of chemical methods produced gave a large amount of research, acquired preliminary results. Japan, Sri Lanka and other countries to green tea of chlorophyll respectively the chlorophyll content and magnesium rates and quality of tea relations are studied. The British tea tea tea yellow and tea red element and tea red element spectrophotometric and the tea quality of identification, and testing in market evaluation photoelectric colorimetric determination of black tea polyphenols, soup, theaflavins three indexes. The French price of tea aroma composition and compared the correlation with  Iron Goddess of Mercy Tea analysis. Japan, the former Soviet union, Sri Lanka and other countries application gas chromatography, infrared spectrometry, mass spectrometry and other new technology, the analysis tea aroma composition, etc. But tea color, aroma, taste is the formation of the Tie Guan Yin Tea / Ti Kwan Yin Tea complex, tea quality fit and unfit quality and levels of discretion is not and embedded components number of how many simply a positive correlation or negative correlation, often is the many elements to apply suitable comprehensive effect than, coordinate the results. The combination relation some has yet to be recognized. Therefore, countries and international trade for the tea quality fit and unfit quality and level and appraisal, still use sensory evaluation method, and aided measuring some physical and chemical and project.

    The tea is another feature inspection of various countries on the extensive tea inspection standard and deeply studied. Such as ISO – food and agriculture technology committee set up tea in the 1960s, namely technology commission points in 34 / SO8 ISO/TO undertake corporate development, specially the task of relevant international standards. Tea It is a nongovernmental international organization, its resolution though not binding, but for all countries recognized. Now the organization has officially members 20, observer member 26, liaison members have held 7, 14 times meeting, about  Iron Goddess of Mercy Tea research report, issued by the paper material 370 articles. Since the 1970s, it has successively recommend tea international standards within 15 items, are developing eight of every five years, and the original standard review and revision. Tea producers and importers have set their own standards and national standards, has formulated the producers mainly has: China, India, Japan, the former Soviet union, Sri Lanka, Turkey, Kenya, Bangladesh and Mauritius, etc. Importing countries mainly has: the United States, Britain, Australia, Egypt, Pakistan, France, Germany, Chile, Romania, Bulgaria, the Czech republic, Slovakia, Saudi Arabia, Hungary, etc.