But Xu Feng was also clear about their ideas. He coughed a few times from time to time, which was quite a bit of the momentum of the chief.

"Sir, I think it's the first time for you to explore our Versailles armed zone. Unlike other armed zones, the science and Technology Institute here is not open. All the rooms here are closed, and there is self supplied oxygen in them. Those scientists have been studying for months, or even years. There is one room, or even three years, without opening the door!" A second lieutenant respectfully said.

"haven't you opened the door in three years?"

Xu Feng thought it...