Joseph climbs to the top of China World Trade Center Tower 3B. He and his girlfriend Chen Xue scaled the 316-meter-tall skyscraper in Beijing this February. (Screenshot of the video)

Extreme sports have gained a great deal of popularity in China. Enthusiasts say that going to the edge and beyond provides a thrill like no other.

Recently, a breathtaking video titled "Roof topping the China World Trade Center Tower 3B" went viral on Chinese social media and video sharing sites (the video is also available on Youtube).

The couple in the video, a man named Joseph and his girlfriend Chen Xue, are both top Chinese climbers. They met through extreme sports, and in February of this year, the two managed to summit a tower of the China World Trade Center in Beijing. They recorded their adrenaline-fueled journey from break-in to summit with forehead-mounted cameras.

Chen Xue said she was not scared when climbing the 316-meter tower, nor is she scared when climbing other structures of this kind. Because of strong winds at high altitudes, they chose to attempt the challenge in good weather. However, a lawyer said that unauthorized building-climbing is illegal in China and endangers public safety.

In February 2014, two young Chinese men, both from Zhengzhou, in central China's Henan province, snuck into the Shanghai Tower construction site. Their goal was to climb to the top, just as two Russian thrill seekers did earlier in the same month. (Screenshot/Weibo)

One of the Chinese climbers told newspaper Dong Fang Daily, "If foreigners can climb to the top, then we can, too." Shanghai Tower was still under construction at that time. At 650 meters, it's the tallest structure in China and the second tallest building in the world. (Screenshot/Weibo)

A Russian man climbs to the top of Shanghai Tower. The climber was one of the two Russian men who scaled the 650-meter-tall skyscraper while construction was suspended during the Spring Festival Holiday in 2014. (Screenshot/Video)