China has joined Russia in congratulating North Korea on the conclave of its ruling party, hailing economic achievements under the leadership of Kim Jong-un and pledging to work with Pyongyang to promote regional peace. According to Xinhua, the Central Committee of China’s Communist Party sent a congratulatory letter on Thursday, asserting that the ruling Workers’ Party of Korea had in recent years helped develop the North Korean economy and improve the lives of its people. China’s state news...