The 800 kg you mentioned is the output in the experimental demonstration, which is difficult for ordinary farmers to grow. The yield per mu is 650-700 kilograms. You can contact Longping Hi-Tech. If I remember correctly, they have a subsidiary in Sichuan. Www.lpht.com.cn Longping Hi-Tech also has a subsidiary named Hunan Longping Seed Industry Co., Ltd., which specializes in hybrid rice seeds. You can contact them. 4692 14 1， www.lpseed.com .
What needs to be corrected is that these varieties you mentioned were not actually completed by Academician Yuan at the earliest time, but were all the results developed under the leadership of Academician Yuan's scientific research ideas or under his direct guidance.