In the case of limited varieties and no-frame cultivation, two or three branches are left when each plant grows to 30 cm high, two leaves are left in the main branch after the third flower appears, and two leaves are left in the back branch of 1 flower. If you use scaffolding to cultivate infinite varieties, there are generally two kinds of plastic surgery: single-pole plastic surgery and double-pole plastic surgery. Unipolar plastic surgery is to leave only the main branch and remove all the side branches, while bipolar plastic surgery leaves one main branch and one side branch. The yield per mu 1.600 plants is shaped by double knives, and the yield per mu is about 3000 plants by single knife. Usually leave 3 to 5 flowers and 2 leaves at the top. It is especially important to remember that you can't cross for the first time until most of the lateral branches grow to about 30 cm, otherwise the growth will be poor. The fork that grows again in the future is about 5 cm.