As Northeast China welcomes the busiest farming season, several unmanned agricultural machines were busy demonstrating automatic operations on a farm of Baoquanling Co, part of Beidahuang Agricultural Reclamation Group, a State-owned enterprise in Heilongjiang province.

Pulled by unmanned tractors, stratified fertilizer applicators, electric control seeders and pesticide spraying machines work together to sow corn on the vast farmland.

"The sowing operation by unmanned agricultural machines can achieve high precision and avoid repeats and missing sowing," said Zuodan Jianfei, a staff member from the company's agricultural production department.

"They can work continuously for a long time, and can complete the task of sowing on more than 60 hectares of farmland every day, which has great advantages in saving seeds, labor costs and improving operation standards."

Video by Fan Minghai.