Agent: Let Me Be an Undercover Agent, but I Will Get Stronger After Stabbing You in the Back?

"What do you think is the best lurking?" Xu Xiaoyi, who arrived from time travel, looked at Zheng Yaoxian in front of him and shook his head slightly. "Sell out!" "Betray your friends, betray your relatives, betray everyone you can betray, betray..." Zheng Yaoxian pointed to his heart: "My own soul!" From then on. A ghost wanders among the underground battle lines... Buy and sell intelligence, assassinate and save people! What the three heroes of Longtan cannot do, I will do it! What the military can't handle, I'll handle it! On the underground front, there are only things that I, Xu Xiaoyi, don't want to do, and there is nothing that Xu Xiaoyi can't do! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.