At the beginning of Yang Bangjie's return to China, there was a sericulture department in A&M school in Zhong Kai, while the Agricultural College of Sun Yat-sen University only offered sericulture courses. After Yang took office, he was determined to seek improvement and development. He has successively expanded the small mulberry field of sericulture department in Zhong Kai A&M School into a 400-mu experimental mulberry field, and built two new experimental silkworm houses with small silkworm eggs cold storage 1 room. A sericulture course in the Agricultural College of Sun Yat-sen University was expanded to sericulture, and courses such as sericulture, seed production, mulberry planting, silkworm physiological anatomy, raw silk generalization and silk making were added. Soon, sericulture door expanded to sericulture department, and several female sericulture engineering classes were held. To this end, many well-known experts and professors are sought, such as Gui (a Korean sericulture farmer living in Japan) and Shen Dunhui, who come to our school to teach, take part-time jobs or give lectures. The teaching and research work of sericulture department is gradually on the right track.

On the one hand, Yang Bangjie was determined to plan and handle all the work of the school, and personally handled or tried the arrangement of sericulture courses, the compilation of lecture notes, the construction of sericulture rooms in mulberry fields, the development of experimental research work, the feeding plan of experimental silkworms, and the employment and training of technicians and workers. At the same time, I personally taught related courses and compiled lectures on sericulture, sericulture and sericulture. These lectures take Japanese textbooks as the main reference materials, and at the same time absorb domestic customs and traditional production experience, as well as his own experiments, observations and research results. When translating terms adopted abroad, we often discuss and deliberate with people in the sericulture industry repeatedly, and then determine Chinese terms that are more suitable for China. After the handout was compiled, it was very popular with other sericulture schools and was selected as a reference.

During the period of 1936- 1937, the sericulture department of the Agricultural College of Sun Yat-sen University, with the support of relevant parties, opened up more than 400 mu of mulberry fields and varieties of mulberry fields, preserved 1 15 mulberry fields, built 1 large-scale silkworm eggs cold storage, and acquired various kinds of silkworm eggs.

1938, the Japanese army invaded the south, and in 10, the sericulture department moved to Chengjiang, Yunnan with the headquarters, and the teaching work came to a standstill due to the shortage of funds. At this time, there are more than 500 silkworm varieties preserved in the sericulture system, including many precious raw materials, genotypic materials and production varieties, which are very difficult to raise and preserve. Once lost or dead, it will cause great losses to sericulture in China. When he moved to Guangxi, he published articles such as Anti-Japanese War and Sericulture, stating the significance of sericulture to the Anti-Japanese War and the founding of the People's Republic of China, and led Chen, Jiang Tongqing, Tang and others to meet the head of the Agriculture and Forestry Department of Guangxi Construction Department. I waited three days for the interview and allocated some money. At that time, someone advised him why he was so humble He said: "I'd rather sacrifice everything for sericulture, and it's nothing to wait for two or three days!" " The listener was deeply moved. Due to obtaining funds, the sericulture department set up a workstation in Hanoi, Vietnam (then a French colony), planned a 10,000-mu comprehensive sericulture farm in Longzhou, Guangxi, set up a silkworm egg farm in Pingnan, Guangxi, and set up a silkworm egg breeding workstation in Guilin, Guangxi. Later, the sericulture department moved from Yunnan to Pingshi in Guangdong and Yizhang in Hunan with Sun Yat-sen University. Yang complained to the Hunan Provincial Construction Department many times and got support. He founded Hunan Silk Improvement Factory in Leiyang, Hunan Province, and set up sericulture workstations in Lixian County and Changsha, Hunan Province. The sericulture in Guangxi, Hunan and other places has gradually developed, and more than 500 silkworm varieties protected by the sericulture system have all been properly preserved.

In the later period of War of Resistance against Japanese Aggression, some teachers of Yang Bangjie and Sun Yat-sen University and all the staff of Hunan Silk Improvement Factory moved to the top of Xuejiashui Mountain in Yizhang, Hunan Province, and lived there for more than a year. 1it was only on August 25th, 945 that I learned the news of Japan's surrender. While he was excited and happy, he thought that he must be demobilized as soon as possible and resume production. On September 4th, 1945, he set out with several employees. At that time, roads and railways were destroyed by the Japanese army. They arrived in Changsha by land and water, reported to the Provincial Construction Department, and applied for setting up a silk improvement plant in Lixian County, a workstation in Leiyang and an office in Changsha. Demobilization will be carried out immediately after approval, so that Hunan Silk Improvement Plant can quickly resume testing and production.

1928 After Yang Bangjie returned to China, sericulture education was established and developed in South China for decades, which trained a large number of talents for the country and made lifelong efforts and indelible contributions to improving sericulture production in Guangdong, Guangxi and Hunan.