After the one-month trip, I finally came back to Hong Kong, the "home" with friends and my bed. Fighting with the jet leg, It seemed I got recovered in two days, which is a bit faster than I thought.
I took the continental airline back, and met such a happy flight attendant. He, in his fifties or sixtieth, is so happy, either when he handed me the towels, or gave me another ice cream. He talked to passengers just like old friends. When he said goodbye to everyone at last, he even started singing. Such a happy person. Compared to some others, (especialy a young male attendent who has no expression in the face at all), this elder man really make travellers feel relaxed.
So here is what I learnt: love your job; if you don't love the current job, then find the one you love. Life is short, and why don't live happily?