Secondly, in many provinces of China, potato is the largest tissue culture at present, because many provinces are now taking potato as an industry, and the scale of tissue culture is not small, with tens of millions of inputs and annual output similar; Eucalyptus is produced in large quantities in tissue culture, not as a green seedling, but because of its medicinal and health care value; At present, there are not many kinds of plants that produce tissue culture seedlings on a large scale in China. As far as I know, potato and Dendrobium officinale are two major plants in a broad sense, in addition to Phalaenopsis, strawberry, anoectochilus roxburghii, honeysuckle, grapes, medlar and so on, which are different in different regions.