Students attend a stewardess skill training for the upcoming 2017 entrance examination for art majors in colleges in Luoyang, central China's Henan Province, January 4, 2017. The operation is overseen by a leather clad instructor, seen here grasping the calves of one of her students. (Photo by Li Bo/Xinhua/Barcroft Images)





Students attend a stewardess skill training for the upcoming 2017 entrance examination for art majors in colleges in Luoyang, central China's Henan Province, January 4, 2017. The instructor issues her commands though a microphone as her students check their posture in a mirror. (Photo by Li Bo/Xinhua/Barcroft Images)





Students attend a stewardess skill training for the upcoming 2017 entrance examination for art majors in colleges in Luoyang, central China's Henan Province, January 4, 2017. The proper stewardess strut is another of the skills the students must master in the class. (Photo by Li Bo/Xinhua/Barcroft Images)





Students attend a stewardess skill training for the upcoming 2017 entrance examination for art majors in colleges in Luoyang, central China's Henan Province, January 4, 2017. The proper way to shake hands when greeting people is also coached in the intensive course. (Photo by Li Bo/Xinhua/Barcroft Images)





Students attend a stewardess skill training for the upcoming 2017 entrance examination for art majors in colleges in Luoyang, central China's Henan Province, January 4, 2017. Along with how to stand, how to sit is also covered in these classes. (Photo by Li Bo/Xinhua/Barcroft Images)





Students attend a stewardess skill training for the upcoming 2017 entrance examination for art majors in colleges in Luoyang, central China's Henan Province, January 4, 2017. These photos portray the bizarre range of skills Chinese air hostesses require before they take to the skies. (Photo by Li Bo/Xinhua/Barcroft Images)





Students attend a stewardess skill training for the upcoming 2017 entrance examination for art majors in colleges in Luoyang, central China's Henan Province, January 4, 2017. The proper way to crouch down in the restrictive skirts of their uniforms is also taught to the soon-to-be cabin crew. (Photo by Li Bo/Xinhua/Barcroft Images)





Students attend a stewardess skill training for the upcoming 2017 entrance examination for art majors in colleges in Luoyang, central China's Henan Province, January 4, 2017. Smiling training is also touched on in the classes as the fledgling flight attendants grasp a straw between their teeth. (Photo by Li Bo/Xinhua/Barcroft Images)