Theoretically it is impossible. The hybrid rice he obtained was too early. China only had a patent law in 1985. And so far, patent laws do not protect new plant varieties.
On October 21, 2019, the third-generation hybrid rice was tested publicly for the first time in Qingzhu Village, Hengnan County, Hengyang City, Hunan Province, with a yield of 1,046.3 kilograms per mu. The third-generation hybrid rice technology uses genetically engineered male sterile lines as genetic tools, which allows all rice species to theoretically find a suitable "other half" and produce excellent offspring.
With the application and promotion of hybrid rice, the yield per unit area has been increased and the amount of seeds used has been reduced; the hybrid rice direct seeding cultivation technology eliminates the traditional rice seedling cultivation process and directly sows the germinated rice seeds. It is a simplified cultivation method that goes to the field and manages it until it becomes seedlings, tillers and mature.