Tomatoes should be determined according to varieties, planting density, in-frame or frameless cultivation. If planting limited varieties and non-frame cultivation, 2 ~ 3 branches should be left when each plant grows to 30 cm high, 2 leaves should be left on the main branch after the third flower appears, and 2 leaves should be left on the side branches after 1 flower. If you use scaffolding to cultivate infinite varieties, there are generally two kinds of plastic surgery: single-knife plastic surgery and double-knife 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. Generally, leave 3 ~ 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.