你以為不要付款的人會客氣嗎?不不不,有時候要付款的人才客氣呢。
This is because of the services is free of charge? No, no, no! Sometimes, those have to pay the money should be better and with good tempation.
事實是:這都是個人修養與教養的問題。
The fact is: This is the personality and the cultural.