C148 Blue Retention Solution

Heng Yanlin had also been to Mu Shishan's office many times, so he was familiar with it. After a while, he arrived outside Mu Shishan's office, Heng Yanlin knocked on the door, and waited for Mu Shishan to reply before opening the door and entering.

Mu Shishan was arranging some documents, raising his head and seeing that it was Heng Yanlin, he was startled for a moment