Due to the limited yield, Mingqian tea (tea that is picked before the Tomb Sweeping Festival) is always highly priced. It is not easy to have the chance to sip Mingqian tea. Hangzhou is now trying to apply blockchain, big data, NB-loT and other technologies into the processing of Longjing tea, including planting, picking and frying, to help provide true Longjing tea to customers.