Pony.ai has begun 24-hour autonomous vehicle testing in Beijing, Guangzhou, and Shenzhen, expanding trials to nighttime scenarios with limited public transit. The Arcfox Alpha T5 fleet, co-developed with BAIC BJEV, carries 34 sensors and supports all-weather, all-route operation. The company has reportedly logged over 50 million kilometers and 500,000 hours of testing to date.