Love is a game that turns a pair of strangers into lovers and a pair of lovers into strangers. -Zhang Xiaoxian, a Hong Kong female writer

In this dangerous world, you should have enough courage to be nice to a stranger first, if you don't want strangers to be hostile to you. A virtuous circle can't just wait for the next person to start, can it? —— He Jiong, a well-known host in China and a teacher of Arabic Department of Beijing Foreign Studies University.

If a person is kind and polite to strangers, he must be a sincere and compassionate person. His heart is often connected with other people's hearts, not isolated. -Francis Bacon, English Renaissance writer and philosopher.

People allow a stranger to get rich, but they can't tolerate the promotion of a person around them. Because there are contrasts and conflicts of interest between people at the same level, strangers do not have this problem. —— Yu Dan, a professor and cultural scholar at Beijing Normal University