I recommend the "Late Ming Unlimited Exchange System" to you! In this historical novel, the main character Li Zicheng was reborn as Emperor Chongzhen during the Chongzhen period, and he had an unlimited exchange system. Through constant exchange of weapons, he had obtained powerful weapons such as Great Ming's tanks, aircraft carriers, fighter jets, submarines, and spaceships, becoming Great Ming's savior. If you want to know more, you can read this novel. I hope you like this fairy's recommendation. Muah ~😗