More than 1,300 primary school students attend a calligraphy competition in Yinchuan, capital of Northwest China's Ningxia Hui autonomous region, on Tuesday. (Photos: China Daily)

Primary school students wearing traditional Han Chinese attend a ceremony during a calligraphy competition in Yinchuan, capital of Northwest China's Ningxia Hui autonomous region, on Tuesday.

More than 1,300 primary school students attend a calligraphy competition in Yinchuan, capital of Northwest China's Ningxia Hui autonomous region, on Tuesday.

More than 1,300 primary school students attend a calligraphy competition in Yinchuan, capital of Northwest China's Ningxia Hui autonomous region, on Tuesday.

More than 1,300 primary school students attend a calligraphy competition in Yinchuan, capital of Northwest China's Ningxia Hui autonomous region, on Tuesday.

More than 1,300 primary school students attend a calligraphy competition in Yinchuan, capital of Northwest China's Ningxia Hui autonomous region, on Tuesday.

More than 1,300 primary school students attend a calligraphy competition in Yinchuan, capital of Northwest China's Ningxia Hui autonomous region, on Tuesday.