Power cuts are affecting homes and businesses in northeast China.
The country's energy supply is tightening as winter approaches, factories have been forced to slow down or close.
The problem has impacted suppliers from major international brands like Apple and Tesla.
Wu Bin explains what led to the shortage.
Overseas demand has rebounded, and Chinese companies are struggling to keep up.
In the major export hub Zhejiang, power cuts have left the production lines idle.
High coal prices are making it unprofitable to operate.
The cost has tripled compared with 2019, we cannot finish the overseas orders, and we have to shut down if we don't raise the price.
Similar stories are being told in Guangdong, the province with biggest economy.
But some companies view reduced inventories differently.
The cost has increased by four times since last year.
I think power rationing will be helpful in the long run,
because when we stop operation, the cost of raw materials would stop soaring.
A string of factors are at play, prices for raw materials and transport are rising globally,
and the summer drought has meant fewer sources for clean energy generation.
The big question now is whether the shortage is byproduct of the pandemic, or something that will persist for a long time.
For now at least, local authorities in the northeastern province of Jilin, have promised a sufficient heating supply for the upcoming winter.