LANZHOU, Jan. 9 (Xinhua) -- Ju Aiguo only completed the first grade of elementary school, but now, at the age of 55, he is an agricultural technician with a medium-grade professional title, as well as a successful apple farmer.
"Trimming, fertilizing, field management and plant protection are four vital steps of planting huaniu apple trees," said Ju, who has been planting the huaniu apple for more than four deca
