What are the requirements for dry maintenance of residential property?

Maintenance workers in property companies generally have comprehensive maintenance workers and professional maintenance workers:

Comprehensive maintenance worker: Must have working experience in the same position, know all about water and electricity, and must have electrician certificate. At the same time, I also know masons. Understand the knowledge of electrical equipment maintenance and know how to maintain electrical equipment.

Professional maintenance workers are divided into: strong current maintenance workers, weak current maintenance workers, HVAC maintenance workers, civil maintenance workers and so on.

However, property companies generally use comprehensive maintenance workers, and large property companies will have professional maintenance workers.