Wang Lin kept Yun Fei because she had some use. If she didn’t, then to prevent the news of him leaving the chaotic broken stars, he would’ve already sent her to the underworld and would’ve kept playing the game of cat and mouse with Qian Kun.
Wang Lin knew that if he were to let the disciples of Duanmu, Six Desire Devil Lord, Hunchback Meng, and Ancient Emperor know that he came out of the Land of the Ancient God, the future would hold nothing but trouble for him.
Among those people, there will certainly be someone who knows the truth about what’s inside the chaotic broken stars. Once Wang Lin has been exposed, he will be hunted endlessly by the disciples of those sects. If all those disciples were below the Nascent Soul stage, then they wouldn’t pose much of a threat. However, once Nascent Soul disciples show up, it would definitely be troublesome.
In conclusion, complete silence was a much better choice. It would save a lot of trouble and he would be a lot safer.