At the end of 2018, on the eve of his departure to Zimbabwe, Luo Dengfeng felt deeply guilty for not going to be there to take care of his 85-year-old father in the next three years. This is not the first time that Luo has been away from his family. As early as 2012, he went to Ethiopia to participate in an agricultural vocational and technical education project conducted by China, serving as a horticulture teacher in a local college.