A teacher puts the hat on a student during an adult ceremony in Xi'an, capital of northwest China's Shaanxi Province, May 2, 2015. Over 1,000 students attiring Han costumes bowed to teachers and parents to declare being grown-ups. (Xinhua/Liu Xiao)

A mother efface the tears on her daughter's face during an adult ceremony in Xi'an, capital of northwest China's Shaanxi Province, May 2, 2015. Over 1,000 students attiring Han costumes bowed to teachers and parents to declare being grown-ups. (Xinhua/Liu Xiao)

Students take part in an adult ceremony in Xi'an, capital of northwest China's Shaanxi Province, May 2, 2015. Over 1,000 students attiring Han costumes bowed to teachers and parents to declare being grown-ups. (Xinhua/Liu Xiao)

Students embrace their parents during an adult ceremony in Xi'an, capital of northwest China's Shaanxi Province, May 2, 2015. Over 1,000 students attiring Han costumes bowed to teachers and parents to declare being grown-ups. (Xinhua/Liu Xiao)

A student embraces his parents during an adult ceremony in Xi'an, capital of northwest China's Shaanxi Province, May 2, 2015. Over 1,000 students attiring Han costumes bowed to teachers and parents to declare being grown-ups. (Xinhua/Liu Xiao)

Students take an oath during an adult ceremony in Xi'an, capital of northwest China's Shaanxi Province, May 2, 2015. Over 1,000 students attiring Han costumes bowed to teachers and parents to declare being grown-ups. (Xinhua/Liu Xiao)

Students bow to their parents during an adult ceremony in Xi'an, capital of northwest China's Shaanxi Province, May 2, 2015. Over 1,000 students attiring Han costumes bowed to teachers and parents to declare being grown-ups. (Xinhua/Liu Xiao)