Transgene plants are plants that have genes from other species. The process of genetic change can come from crossbreeding between different species, but today the term refers more specifically to plants that have been artificially inserted into genes of other species in the laboratory through recombinant DNA technology to create plants with new characteristics.

Purple berries are perennial herbs. It is mostly used for medicinal purposes or as a vegetable. Zi Bei Cai is native to China, according to the "national compilation of Chinese herbal medicine" in the record: Zi Bei Cai has the treatment of coughing up blood, hematochezia, menstrual pain, blood loss, bronchitis, pelvic inflammatory disease, heatstroke, amoebic dysentery and external trauma bleeding and other efficacy.

The whole plant is fleshy. The root system is more developed, lateral roots, shallow, regenerative capacity. The general plant height of about 45 centimeters, branching strong. The stem is nearly round and erect, the back of the leaves and shoot tips purple-red, tomentose. Strong resistance to stress, more resistant to drought and heat. Barrenness, the growth temperature of 20-25 ℃, more shade-tolerant, but in full sunlight growth is more robust.