Develop Air and Space Fighter Jets Just to Get Out of Prison

A letter marked by Baidi Air and Space Fighter was mailed to Longhang Yifei. "Is this the same concept that was proposed ten years ago?" "I didn't expect that someone actually completed it. Where is the mailing address?" Master Tang asked in shock. "The mailing address seems to be in Star City Prison." Someone replied in shock. "Seal this place immediately and call people from the Investigation Bureau and the Secret Bureau to come over." "Also, find the sender immediately and bring him here!" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.