Video: A Chinese company has unveiled the world’s first robot dog to feature the precise motor control required to carry a person safely across the most rugged terrain, making it suitable for a range of military and civilian uses, according to online commenters. 據網路評論者稱，一家中國公司推出了世界上第一款機器狗，它具有精確的電機控制功能，可以載人安全穿越最崎嶇的地形，使其適合各種軍事和民用用途.

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B2-W, a four-legged, wheeled robot that features precision posture control and advanced acrobatics, was showcased in a video posted by developer Unitree to its social media account on Monday.

In the video, B2-W performs mid-air flips, rotations and handstands while also demonstrating remarkable stability as it descends a nearly 60-degree gravel slope, navigates streams, climbs waterfalls and speeds across a range of terrains.

The robot is also shown temporarily retracting its hind legs, performing inverted landings, and jumping from a height of 1.9 metres (6.23ft). In standard four-legged mode, it can leap from 3 metres, absorbing the impact with its flexible legs.

In one test featured in the Hangzhou-based company’s video, the B2-W shows off its load-bearing and balancing abilities by carrying an adult rider up and down slopes with ease.

“Unitree’s B2 series robot is currently the world’s first and only robot dog designed for riding. It showcases extraordinary biomimetic performance,” said Xiaolan, a robotics reviewer, after a hands-on testing of the B2-W.

According to the Unitree website, the B2-W weighs about 45kg (99lb) and has been in mass production for a year.

It is fully electric and capable of operating for five hours on a single charge when unloaded, at a top speed of more than 20km/h (12.4mph). With a 40kg load (88lb), the B2-W can travel up to 50km (31 miles).

The robot is also equipped with advanced sensors, including lidar, depth cameras, optical cameras, and high-powered wheel motors developed in-house, according to the website.