Children learn tea ceremony at a training class in Changchun, Northeast China's Jilin province, May 11, 2013. The class, held on weekends, teaches children 3 to 6 years old about traditional Chinese culture, including etiquette and Han Chinese costumes. [Photo/Xinhua]

A worker of the China Post Group shows stamps for Mother's Day in Zhangjiajie, Hunan province, May 11, 2013. The China Post Group on Saturday issued a stamp for Mother's Day. The stamp features a heart shape and carnation, with four types of wishes after scratching off the coating. [Photo/Xinhua]