Prospective flight attendants practice smiling during a training session in Chengdu, Southwest China's Sichuan Province, March 19, 2008. Air China, the official carrier of the Beijing Olympic Games, started to train the first batch of 34 candidates during a nationwide selection of flight attendants for flights during the Games. [Asianewsphoto]

A prospective stewardess practice smiling during a training session in Chengdu, Southwest China's Sichuan Province, March 19, 2008. Air China, the official carrier of the Beijing Olympic Games, started to train the first batch of 34 candidates during a nationwide selection of flight attendants for flights during the Games. [Asianewsphoto]

Prospective flight attendants practice smiling during a training session in Chengdu, Southwest China's Sichuan Province, March 19, 2008. Air China, the official carrier of the Beijing Olympic Games, started to train the first batch of 34 candidates during a nationwide selection of flight attendants for flights during the Games. [Asianewsphoto]

Prospective flight attendants practice smiling during a training session in Chengdu, Southwest China's Sichuan Province, March 19, 2008. Air China, the official carrier of the Beijing Olympic Games, started to train the first batch of 34 candidates during a nationwide selection of flight attendants for flights during the Games. [Asianewsphoto]

Prospective flight attendants practice smiling during a training session in Chengdu, Southwest China's Sichuan Province, March 19, 2008. Air China, the official carrier of the Beijing Olympic Games, started to train the first batch of 34 candidates during a nationwide selection of flight attendants for flights during the Games. [Asianewsphoto]

Prospective flight attendants learn the proper sitting posture during a training session in Chengdu, Southwest China's Sichuan Province, March 19, 2008. Air China, the official carrier of the Beijing Olympic Games, started training the first batch of 34 candidates during a nationwide selection for service during the Games. [Asianewsphoto]

Prospective flight attendants learn the proper sitting posture during a training session in Chengdu, Southwest China's Sichuan Province, March 19, 2008. Air China, the official carrier of the Beijing Olympic Games, started training the first batch of 34 candidates during a nationwide selection for service during the Games. [Asianewsphoto]

An instructor helps a prospective flight attendant trainee practise her smile in Chengdu, Southwest China's Sichuan Province, March 19, 2008. Air China, the official carrier of the Beijing Olympic Games, started training its first batch of 34 candidates during a nationwide selection for Olympic flight attendents. [Asianewsphoto]