C767 Heavenly Official's Decree
Wu Zhongyuan wasn't the only one who was nervous. Wang Xinran was also nervous. The two of them turned around almost at the same time and found a stone wall with weeds behind them. There was no trace of a wormhole.
The disappearance of the wormhole meant that this two-way wormhole indeed needed to carry some kind of special object to travel back and forth