Is Rhus chinensis (Galla chinensis) reproductive or parity? The key lies in the production of aphids. Less aphid production, less yield. Without worms, there would be no multiplication. This is an important factor in success or failure. Raising aphids is the first step to increase the yield of gallnut. So what? For trees that don't reproduce for a long time after planting or don't reproduce in large quantities, the shortage of aphids in nature or the excessive losses caused by overwintering and freezing damage should be supplemented artificially. The method is to wait until the naturally bursting ploidy aphids fly out. Sweep it gently with a brush and put it into the pre-cultivated red-toothed moss, allowing it to grow on its own. Cover the newly caught moss with gauze. In case the aphid flies away, it can be cleared in 20 days. If moss leaves are found to be dry and yellow, straw and other mulch can be properly covered to ensure safe winter. Wait until the middle and late February of the following spring. Aphids fly to trees to collect galls and reproduce.