For Bill from the US, this is his favorite Chinese phrase. Whether it's with a friend or a stranger, he gets a real kick out of using it. A little kindness, a smile, a word of gratitude–his response ...

世界总人口的五分之一说汉语。普通话是中华人民共和国的官方语言，也是使用最广泛的语言，使用者达八亿人。从新加坡到 ...