51Sim Becomes the Only Chinese Company on NVIDIA's Halos SAFE List, and Its Parent's Stock Jumped 30 Percent in a Day

NVIDIA has picked its Chinese partner for autonomous-driving safety validation. The company's Halos SAFE ecosystem roster, published alongside its GTC Berlin keynote on October 21, lists 51Sim — the simulation subsidiary of Hong Kong-listed 51WORLD (6651.HK) — as the only Chinese company among the accepted ecosystem members. 51WORLD confirmed the selection in a filing on the evening of October 22.

Halos SAFE is NVIDIA's framework for generating what it calls measurable, traceable safety evidence for automated driving: it connects simulation testing, software- and hardware-in-the-loop evaluation, road testing and fleet monitoring into one pipeline spanning design, deployment and validation. Being on the ecosystem list does not certify a product; it marks a vendor whose tools are meant to plug into that pipeline.

For 51Sim, the integration point is SimOne, its intelligent-driving simulation platform. The plan, per the companies, is to wire SimOne into Halos SAFE workflows while contributing test scenarios aligned with Chinese regulatory standards, simulation credibility assessment, and real-vehicle testing capability — a combination aimed at both domestic OEMs and overseas carmakers that need to validate against Chinese conditions. It is the second notable NVIDIA collaboration this year: SimOne 4.0 and the Dataverse data platform already integrate Omniverse NuRec technology.

Markets moved fast. On October 23, 51WORLD closed 30.31 percent higher at 65 Hong Kong dollars, topping the southbound turnover gainers list with 1.19 billion Hong Kong dollars in Stock Connect turnover, and its market value reached roughly 27.2 billion Hong Kong dollars. For the week it gained 58.92 percent — the best performance of any Hong Kong tech stock in the period. Those are exchange-reported trading figures, and single-day moves of that size tend to unwind at least as fast as they arrive.

The fundamentals behind the move are thinner but real, and they come from the company itself. In the first half of 2026, 51WORLD reported revenue of 124 million yuan, up 129.8 percent year over year, with 51Sim's revenue up 545.2 percent and its share of the total climbing from 14.8 percent to 41.4 percent. Gross margin reached about 44.8 percent and net losses narrowed 25.5 percent. The company remains loss-making; the ecosystem listing is a validation signal, not a revenue line.

The backdrop is NVIDIA's push to make physical AI — telecom networks, autonomous driving, humanoid robots — its next growth story. At the same Berlin event it added Volkswagen vans, Jaguar Land Rover, Volvo and Mercedes-Benz to the Hyperion drive architecture and showed the Vera Rubin platform in full production. For Chinese AV software suppliers, which face restricted access to Western markets on the hardware side, ecosystem validation of the software layer is one of the few export routes left open.

What to watch: whether ecosystem membership converts into named OEM contracts, and whether 51Sim's robotics ambitions — the company says it wants to extend its simulation stack to embodied AI — get the same treatment. A 59 percent weekly gain prices in a fair amount of both.