Many cities in China are becoming really hot as summer arrives. Beijing issued a yellow alert on Tuesday for high temperatures. People are ready to prevent sun damage to their skin when going out. (Photos: VCG)

Visitors to the Beijing International Horticultural Exhibition hold sunshades and wear hats and masks to prevent tanning, on May 23, 2019.

A girl uses a hand-holding-fan to cool herself down when visiting the Beijing International Horticultural Exhibition on May 23, 2019.

Visitors to the Beijing International Horticultural Exhibition hold sunshades and wear hats and masks to prevent tanning, on May 23, 2019.

People wear masks and sunglasses to prevent sunburn in Suzhou, East China's Jiangsu Province, on May 23, 2019.

Citizens hold sunshades and wear hats to prevent sunburn in Xi'an, Northwest China's Shaanxi Province, on May 23, 2019.

A visitor holds a parasol when boating on West Lake in Hangzhou, East China's Zhejiang Province, on May 22, 2019.