![](http://www.ecns.cn/hd/2023/07/03/8960e2f940264206850b9886d678fe93.jpg)
Tourists view "blue tears" over the coastal waters at night in Dalian, northeast China's Liaoning Province. Caused by bioluminescence, this phenomenon has drawn many viewers. (Photo/VCG)
![](http://www.ecns.cn/hd/2023/07/03/c0c2643743a7420898365b9812626605.jpg)
Tourists view "blue tears" over the coastal waters at night in Dalian, northeast China's Liaoning Province. Caused by bioluminescence, this phenomenon has drawn many viewers. (Photo/VCG)
![](http://www.ecns.cn/hd/2023/07/03/b6c1b7a22355429c93c6029b0eda1e2f.jpg)
Tourists view "blue tears" over the coastal waters at night in Dalian, northeast China's Liaoning Province. Caused by bioluminescence, this phenomenon has drawn many viewers. (Photo/VCG)