In March 1997,Funakoshi was traveling alone in China as a college student.On the train from Xi'an,Northwest China's Shaanxi Province,he suddenly got a bad stomachache.A passenger sitting opposite him offered him a hand.At that time,Funakoshi did not speak any Chinese.From the ID the man showed,Funakoshi learned that he was a policeman.When the train got to Luoyang,Central China's Henan Province,the man asked Funakoshi to get off the train with him.Although it was not Funakoshi's destination,he accepted the man's invitation since his body was trembling for more than two hours with pain.

The policeman soon found a hotel near the train station for Funakoshi and paid for the room.Three days later,Funakoshi recovered,and then the policeman invited him to his home for dinner.The young man was quite moved,but the only way he could repay the officer's kindness was repeatedly saying“thank you”before he left.

This small act of kindness showed the simple and pure friendship of ordinary Chinese toward people from another country.Although the Chinese policeman only did what came naturally,his kindness sowed a seed of friendship in the young man's heart.

After 26 years,Funakoshi happened to see the man's name online.To his pleasant surprise,it was the very man he had been looking for all these years.In Luoyang,the Chinese policeman,Liu Puxuan,greeted him with the same smile.“I didn't do anything extraordinary.I only thought that you were a brave young man who was traveling alone in our vast country,”Liu replied shyly.

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Which words can be used to describe the policeman in the text?

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