The soil should be suitable. The ideal soil is saprophytic soil or peat, garden soil, river sand or perlite, mixed evenly according to the proportion of 4:3:2.
Add about 0.5 mature organic fertilizer to the soil. In the process of maintenance, in spring and autumn, you can give it a thin fertilizer every half month.
Legume green growth needs more sufficient light, so in the maintenance process, it should be placed in the light of bright scattered light.
In the process of maintenance, keep the pot soil of Douban green slightly moist. If the water is too much, it will cause rotten roots. If the water is too little, it will also make the leaves rigid and small. If you do the above, you can make its leaves grow round and large.