One of the most powerful typhoons to strike eastern China in decades disrupted air, rail and sea transport after forcing the evacuation of more than a million people from the provinces of Zhejiang and Jiangsu, state media reported.
Typhoon Chan-Hom was packing winds of 162kmph as it hit the city of Zhoushan, slowing from an earlier speed of 173kmph.
It could be the most powerful July typhoon to hit Zhejiang since the Communist Party took power in 1949, the National Meteorological Centre said.
No casualties have been reported yet.
In Shanghai, the commercial capital, all flights out of Pudong International Airport and Hongqiao Airport were cancelled because of the typhoon, state broadcaster CCTV said.
Authorities in Zhejiang said the province may face 1.95 billion yuan ($314 million) in economic losses, with agriculture the worst affected, sustaining 1.44bn yuan in losses.
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 had returned to port.
Typhoons are common at this time of year in the South China Sea, picking up strength from 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.