The K3/K23 international train from Beijing to Ulaanbaatar completed trial operations in March 2025 and is now in preparation for full resumption. The exact reopening time will follow a joint announcement by Chinese and Mongolian railway authorities. For cross-border travel assistance, contact service@intotravelchina.com for real-time ticketing updates and private transfer solutions—we offer bilingual drivers and one-stop itinerary planning.