A big event emerges quietly.

Every body notices and no body takes it seriously that there were something in one of our labs.And this something must cost a lot,otherwise Wang would not take our keys to rooms other than my lab away. He asked who owns a key. He would point someone to keep the keys.

One day this week or last week, Senior Wang talked with Du about something missing in their lab.Then they began to find them,but with no result.They had to tell Liu,then Wang knew. He began to do something, to keep the equipment closely.