Is there an age limit for porters in Shenzhen airport?

Shenzhen airport has an age limit for porters. According to relevant public information, the age limit of baggage handlers in Shenzhen Airport is 18, and they are under 40 years old. Because porters are heavy manual workers, they need high physical strength and endurance, so they are limited in age, need good health and can bear greater physical labor and work pressure.