The Chinese government issued a stern warning to the United States on Wednesday after blind dissident Chen Guangcheng ended his weeklong stay at the U.S. Embassy in Beijing, saying officials were "strongly dissatisfied with the move" to shelter the activist and demanded an apology from Washington. The scolding tone of the message delivered by a Foreign Ministry official and reported by state-run media raised concerns about China's commitment to whatever assurances officials gave U.S.