Άνοιγμα https://cn.wsj.com/articles/%E4%B8%AD%E5%9C%8B1-3%E6%9C%88%E5%A4%96%E5%95%86%E7%9B%B4%E6%8E%A5%E6%8A%95%E8%B3%87%E5%90%8C%E6%AF%94%E4%B8%8B%E9%99%8D26-1-2afa684f