The sky turns red-blooded in Zhoushan, China.

The phenomenon is caused by the refraction and scattering of light, most likely from ship lights in the port.

Residents of Zhoushan were alarmed last weekend when they saw an eerie blood-red sky.

According to accounts, the sky near the port areas is the most red.

As they recorded the darkened horizon, people were terrified, which sparked apocalyptic fears.

People captured the skies turning scarlet red from their homes, balconies, and streets.

With over 150 million views on China's Twitter-like social media platforms, Weibo and Sina, videos and photographs went viral.

Because the Chinese government handled the COVID-19 outbreak, some users have labeled the event a "bad omen."

The actual reason is that the atmosphere forms aerosols that refract and scatter the light of fishing boats and create the red sky.