Wentian

Wentian ("Quest for the Heavens") is the first Laboratory Cabin Module of China's Tiangong space station and its second major element after the Tianhe core module. The module carries eight internal experiment cabinets for space life sciences - covering plant, animal, and microbial research in microgravity - and 22 external experiment adapters. It also introduced a 5-metre robotic arm, three additional sleeping quarters, and a larger airlock that replaced Tianhe's as the primary EVA egress point.

Wentian docked with Tianhe's forward port roughly 13 hours after launch.