'Regrets unexpected incidents hurting US ties'

China's vice premier said on Saturday that he regretted "unexpected incidents" that hurt ties with the United States as he met with US treasury secretary Janet Yellen in Beijing. "Unfortunately, due to some unexpected incidents such as that involving the airship, there were some problems in the implementation of the consensus reached by the two heads of state at a summit last year", He Lifeng said, referring to an alleged Chinese spy balloon shot down by the US earlier this year.