For courier, fast-moving job gets even harder on hot days

In the steaming summer heat of subtropical Guangzhou, Guangdong province, Mo Changli starts his daily package delivery job in the morning with 1.5 liters of bottled water at hand.

Then he sorts courier parcels in the west-facing open-door station of his company, a task that is nothing short of smothering, despite the whirring electric fans fixed on the wall.

"It's like a food steamer, and I have to move fast to get the couriers ready. I feel like a hot dog and I drink from the big bottle," he said.