For China and its top leader, Xi Jinping, the biggest prize from a summit in Washington, notably free from confrontation, may be simple: time. 对于中国及其最高领导人习近平而言，这场在华盛顿举行、显著缺乏对抗色彩的峰会带来的最大收获或许很简单：时间。 Time to cope with a housing market crash that has wiped away…