Frequent power cuts caused by rising consumption and insufficient coal stocks, Wang Zhenghua and Wu Yiyao report from Zhejiang.
Xu Shuhui had to tell his customers, once again, that their orders would be delayed because power cuts and blackouts had suspended production.
Since April, many businesses in Zhejiang province, one of China's most resilient economic engines in the Yangtze River Delta, have been hit by the worst power shortage in years.