Prime Minister of the Kingdom of Cambodia Hun Sen will pay an official visit to China from Thursday to Saturday at the invitation of Premier Li Keqiang.The three-day tour was announced by Foreign Ministry spokeswoman Mao Ning on Monday.Prime Minister of the Kingdom of Cambodia Hun Sen will pay an official visit to China from Thursday to Saturday at the invitation of Premier Li Keqiang.The three-day tour was announced by Foreign Ministry spokeswoman Mao Ning on Monday.