Ships berth at Xingang harbor in Haikou, capital of south China's Hainan Province, June 22, 2015. Tropical storm Kujira strengthened into a typhoon in the South China Sea on Sunday, which is moving northward and likely to become the first typhoon to hit China this year. (Xinhua/Zhao Yingquan)

Ships berth at Xingang harbor in Haikou, capital of south China's Hainan Province, June 22, 2015. Tropical storm Kujira strengthened into a typhoon in the South China Sea on Sunday, which is moving northward and likely to become the first typhoon to hit China this year. (Xinhua/Zhao Yingquan)

A ship goes back to Xingang harbor in Haikou, capital of south China's Hainan Province, June 22, 2015. Tropical storm Kujira strengthened into a typhoon in the South China Sea on Sunday, which is moving northward and likely to become the first typhoon to hit China this year. (Xinhua/Zhao Yingquan)

Ships berth at Xingang harbor in Haikou, capital of south China's Hainan Province, June 22, 2015. Tropical storm Kujira strengthened into a typhoon in the South China Sea on Sunday, which is moving northward and likely to become the first typhoon to hit China this year. (Xinhua/Zhao Yingquan)

Ships berth at a harbor in Haikou, capital of south China's Hainan Province, June 22, 2015. Tropical storm Kujira strengthened into a typhoon in the South China Sea on Sunday, which is moving northward and likely to become the first typhoon to hit China this year. (Xinhua/Zhao Yingquan)

Ships berth at Xingang harbor in Haikou, capital of south China's Hainan Province, June 22, 2015. Tropical storm Kujira strengthened into a typhoon in the South China Sea on Sunday, which is moving northward and likely to become the first typhoon to hit China this year. (Xinhua/Zhao Yingquan)

Ships berth at a harbor in Haikou, capital of south China's Hainan Province, June 22, 2015. Tropical storm Kujira strengthened into a typhoon in the South China Sea on Sunday, which is moving northward and likely to become the first typhoon to hit China this year. (Xinhua/Zhao Yingquan)

Ships berth at Xingang harbor in Haikou, capital of south China's Hainan Province, June 22, 2015. Tropical storm Kujira strengthened into a typhoon in the South China Sea on Sunday, which is moving northward and likely to become the first typhoon to hit China this year. (Xinhua/Zhao Yingquan)