Tie Dan held the Divine Master Jade in his hand, concentrating and calculating, lost in deep thought for a moment.
The Jingwei bird migrates seasonally, nesting at the Kunlun Jade Pool, and migrates to the East Sea Immortal Island in winter, crossing the Central Plains back and forth, flying high, fast, and far to evade most predators. It's not large and can't fight, its feathers aren't particularly vibrant, making it unappealing to the Immortal Palace, and the Mystic Sect has no elixirs for which Jingwei is needed. Using it as a messenger, however, is a clever move by the Divine Sect.
Moreover, if the person communicating with Tie Dan just now was indeed Zhen Baiyu herself, and she wasn't lying, then it seems that the Divine Master Blood Jade also has the real-time communication function over long distances. Presumably, each generation of the Divine Sect Venerable has one, and perhaps they've even set up a chat group to maintain constant communication.