In China, the tea market has changed

The process of buying tea in China is not what it used to be. Only 20 years ago only the state had the authority to export tea, and every Chinese tea was given a specific reference. Expert tasters would travel the whole country, visiting each tea factory and tasting each tea before giving it a reference number. For example a Grand Yunnan Imperial was given a grade of 6112.
Things have changed a great deal since then. Today those Chinese experts have gone, no doubt to the private sector, and domestic consumption has increased dramatically. Demand now outstrips supply, pushing prices up. And nobody thinks to remember how it was done 20 years ago.