Beijing, February 26 (Youth.cn) - Virus-free potato tissue culture seedlings were cultivated in Zhangye, Gansu Province, through a school-to-enterprise cooperation project. Photo shows professionals observing the growing situation of the tissue culture seedlings. In early spring, professionals of a school-to-enterprise project were busy with propagation, culture and transplanting of 40 million virus-free potato tissue culture seedlings. These high quality seedlings pave the way for spring cultivation and sowing. In recent years, the local authority pay efforts to create potato breeding system through modernization, technicalization and industrialization of potato breeding. Until now, 5 potato breeding enterprises provide 67 million tissue culture seedlings annually, driving economic development and people's employment. Photo/CFP