Chinese Ambassador to the U.S. Cui Tiankai this week warned that a “decoupling” of the U.S. and Chinese economies would be disastrous. “Both will be much more prosperous if we cooperate with each other,” Cui said on Wednesday at a reception celebrating the Chinese New Year. “The so-called ‘decoupling’ would be disastrous for both economies and the world economy at large. China will open its door wider to the U.S. and look forward to more cooperation at various levels.” Cui’s...