DEEP Robotics, 云深处科技, A company in Hangzhou, Zhejiang, China
Pretty novel use of wheels on legs to further extend speed and mobility. Possibly the wheels can be locked too to increase traction or even controlled rotation to mimic push-off.
I found this video from another company called deep robotics and the chinese text at the start of the second video match the name of the company you sure its unitree?
A model of the 726AE landing craft at this year's Zhuhai show carries two unmanned amphibious vehicles that was first shown off at the last Zhuhai Airshow (third image below).
