One of the most powerful typhoons to strike eastern China in decades has forced the evacuation of more than a million people from the provinces of Zhejiang and Jiangsu.
There has also been major disruption to air, rail and sea transport.
Typhoon Chan-Hom was packing winds of 162km/h as it hit the city of Zhoushan, slowing from an earlier speed of 173km/h.
It could be the most powerful typhoon to hit Zhejiang in July since the Communist Party took power in 1949, the National Meteorological Center said.
In Shanghai, the commercial capital, Pudong International Airport cancelled 500 flights while Hongqiao Airport cancelled 250 because of the typhoon, the official People's Daily newspaper said.
The typhoon brought heavy rain to Shanghai as well as the provinces of Anhui and Fujian, besides Jiangsu and Zhejiang, the weather service said.
Apart from the closure of schools and the suspension of flights and trains, more than 51,000 ships have returned to port, Xinhua said, citing local authorities.
Typhoons are common at this time of year in the South China Sea, picking up strength from the warm waters before dissipating over land.
Earlier this week, Typhoon Linfa moved slowly across the north of the Southeast Asian archipelago and up to China's southern province of Guangdong.
