Primary school students perform to celebrate the upcoming New Year's Day at a school in Heifei, capital city of east China's Anhui Province, on Dec. 28, 2018. (Xinhua/Liu Junxi)

Primary school students perform to celebrate the upcoming New Year's Day at a school in Heifei, capital city of east China's Anhui Province, on Dec. 28, 2018. (Xinhua/Liu Junxi)

Primary school students perform to celebrate the upcoming New Year's Day at a school in Heifei, capital city of east China's Anhui Province, on Dec. 28, 2018. (Xinhua/Liu Junxi)

Primary school students perform to celebrate the upcoming New Year's Day at a school in Heifei, capital city of east China's Anhui Province, on Dec. 28, 2018. (Xinhua/Liu Junxi)