Mr. Mao Cheng performs after-sales service, including equipment commissioning, operator training and machine maintenance at Ougan Group. He has been engaged in the construction machinery industry for 12+ years. Mr. Mao Cheng has served abroad independently many times.

He is a professional field service engineer for excavators and rotary drilling rigs etc. The rotary drilling rigs transformed and upgraded by him are all well-proven with durable and long-lasting performance.

Familiar with the production and assembly processes of rotary drilling rigs and concrete pump trucks, proficient in hydraulic and electrical systems maintenance, and adept at handling various difficult problems.