Jun Wu Xie had mentioned to them about plant based ring spirits before which gave the two men some ideas to make a rough guess about it, but they they were sensitive enough to not probe her further on it. No matter what it was that Jun Wu Xie possessed, as long as it didn't harm her, they wouldn't mind it.
After Jun Wu Xie concocted the brews, she made the two of them drink it, and with a period of further nursing, all the remnants of poppies would be completely cleared.
In the end, Jun Wu Xie was in no hurry to leave, but went on to make some elixirs and emptied out her entire stock from her Cosmos Sack to hand them all to Jun Qing, for him to distribute them to the more severely injured soldiers.
Mu Chen and Mu Qian Fan came over to see Jun Xie as well. They did not know Jun Wu Xie's real identity but they were highly familiar with Jun Xie and they came and met with the disguised Jun Wu Xie.