West Lake Longjing Green Tea: Authentication, Tracing and Origin

Longjing tea authentication

(Originally published March 21, 2020)

Because of the enormous demand for Longjing from the West Lake Longjing Tea Gardens, much more "West Lake Longjing" is sold each year than is actually grown in the West Lake District of Hangzhou. To combat this fraud, the West Lake District Tea Industry Committee started to issue authentication stickers beginning in 2001.

Authentication sticker and distribution

The Committee has a detailed map of all Tea Gardens in the West Lake District of Hangzhou. They use the calculated average of 1 mu of land producing 25kg of Longjing tea in one season (1 km² = 1,500 mu). 

Each year farmers are required to report any changes in the size of the land used for growing Longjing. Each garden is allotted a set number of authentication stickers for the total amount of Longjing divided by 250g (the standard package size).

The Rules

The authorities have established guidelines for the use of authentication stickers to ensure each sticker is connected to the tea sold by the farmers; that they can provide authentic and accurate tracing and origin information.
The rules set by the local authorities for the authentication stickers/tags are as follows:

1) It is not permitted to resell an authentication sticker.
2) It is not permitted that gardens sell Longjing without including a sticker for each 250g package.

​How to use the tag

Scan the QR code using a smart phone to be redirected to the official website for West Lake Longjing information and certification. Once on the website, the sticker on the certificate can be scratched off to reveal the authentication code. After typing in the authentication code, the tea information will be revealed on the website. These certificates are very strictly controlled and are the only guarantee for buyers that they have certified West Lake Longjing. The website will also reveal how many times the serial number linked to the tea has been checked online. See below for more details:

Longjing tea authentication

1) This is the authentication sticker attached to every 250g package of West Lake Longjing. Scratch the grey strip on the left to reveal the serial number for your package.

Longjing tea authentication sticker instructions

2) Scan the QR Code on the right of the sticker to be directed to the Authentication website.

Longjing tea authentication sticker instructions

3) After scanning the QR Code you will arrive at the website for certificate information. Input the serial number below.

Longjing tea authentication sticker instructions

4) The tracing and origin information will be revealed. The serial number information indicates this tag was checked twice (this is our personal supply and the number was checked again for use in this article).