A security booth in Shenzhen went quiet when a humanoid in a police vest turned and walked the length of the street without a single stiff-legged stutter. Onlookers pulled out phones; one clip crossed 2.3 million views overseas before anyone confirmed it was real. The machine behind the clip was SE01, a humanoid (人形机器人) built by a three-year-old Shenzhen company that most robotics buyers had never heard of.
The clip mattered because humanoids have a well-known tell: the shuffle. Most bipeds lurch forward in small, bent-knee steps that read as broken long before they fall. SE01 did not. It strode, paused, and later, in a lab, it became the first all-electric humanoid documented completing a forward somersault — a move that needs a robot to leave the ground, rotate fully, and absorb landing force in a fraction of a second.
Key takeaways
- EngineAI (众擎机器人) unveiled SE01 in October 2024 with a claimed natural gait driven by an end-to-end neural network, not scripted steps.
- In February 2025 the company demonstrated what it called the world's first all-electric humanoid front flip.
- A Shenzhen street-patrol clip of SE01 went viral in January 2025, drawing a public reaction from an Nvidia research scientist.
- The company raised roughly RMB 1 billion (≈ US$139 million / HK$1.08 billion) across two rounds in July 2025, with JD.com leading one tranche.
- SE01 specs: 170 cm tall, about 55 kg, 32 degrees of freedom, 2 m/s walking speed.
Why a walking style became a business signal
Roboticists have spent a decade arguing that bipedal walking is solved, then watching robots tip over on a ramp. The harder problem is not moving — it is moving like a human well enough that a warehouse or a shop floor will tolerate the machine nearby. EngineAI's bet was that a natural gait, trained through reinforcement and imitation learning on captured human motion, would read as "safe and useful" rather than "experimental."
Founder Zhao Tongyang (赵同阳) is a repeat robotics entrepreneur. He built Dogotix, an early Chinese quadruped maker, then joined XPeng's humanoid program before leaving to start EngineAI in October 2023. That backstory explains the company's speed: SE01 appeared on CCTV's New Year's Gala in late 2024, the lighter PM01 followed in December, and the front flip landed in February 2025.
The flip is not a party trick
A forward somersault is harder than a backflip for a robot because the body commits to the rotation blind — it cannot see the ground it is about to hit. EngineAI says the move validated its joint modules and whole-body control on an all-electric platform, without hydraulics. That distinction matters: hydraulic robots like Boston Dynamics' Atlas can flip, but their cost and maintenance keep them out of factories. An electric humanoid that flips shows the actuator and control stack can handle peak torque and precise landing — the same physics a robot needs to catch itself after a stumble on a real floor.
The commercial footprint
EngineAI is not selling only a hero robot. Its lineup spans the industrial SE01, the open and lighter PM01 (24 degrees of freedom, sold to schools and developers), and the SA01 bipedal research platform. The company says the PM01 commercial edition launched near RMB 88,000, a price point aimed at pulling universities and startups into its developer ecosystem.
The July 2025 financing is the part outside observers should watch. JD.com's interest signals a logistics giant betting on embodied AI (具身智能) — the integration of physical robots with learned behavior — not on a PR stunt. Two rounds — a Pre-A++ led by Xinghang Capital (anchored by XPeng) and an A1 led by JD.com — totaled about RMB 1 billion (≈ US$139 million / HK$1.08 billion), with CATL-affiliated capital, Yintai, and others participating. JD.com's involvement is the signal: a logistics giant does not back a humanoid for sport. It backs one it expects to put to work.
Honest limitations
The natural gait is real in demos; it is not yet proven across thousands of hours on variable terrain. SE01's two-hour battery is thin for a full warehouse shift. The front flip, while impressive, says nothing about manipulation, dexterity, or the ability to do a useful task without a person watching. And a funding round is a vote of confidence, not a shipped product at scale — EngineAI has talked about production in the low thousands for 2025, a number no independent auditor has confirmed.
What readers can do now
- If you build or buy automation, watch EngineAI's PM01 pricing and SDK releases as a low-cost way to prototype humanoid applications without a six-figure commitment.
- If you invest in robotics supply chains, track which Chinese joint-module and force-sensor makers appear in EngineAI's bill of materials — that is where the durable value often sits.
- If you follow the sector, treat a viral gait clip as a technology demo, not a deployment proof; ask for uptime, payload, and battery numbers before reading it as commercial.