After Handing in the System, I Became a National Alien Special Forces Soldier

Li Feng, the delivery boy wearing a yellow robe, was kicked by his girlfriend! ! The loan shark I borrowed for my girlfriend also came due, and I was beaten up by the loan shark. I didn't expect the system to come! ! He can travel through any world! ! The first time I traveled back through time, I brought back a 100-pound watermelon, a 10-pound tomato, and a bunch of broken rocks! ! As a result, the national security department was attracted by this pile of broken rocks! ! From then on, Li Feng began to cooperate with the national security department and became a special soldier! ! The national security department provided him with comprehensive training and protection. He went deep into different worlds and obtained rare earth gold and various unexpected things for the country...