I Can Develop Systems

Others are using crappy systems, but I am special. I develop systems directly. I not only develop but also sell systems. Want to be the emperor on a whim? I directly develop the emperor system... Want to become an immortal? The Chengxian system is under development... No artifact? Directly add the All Worlds Weapons Store function to the system! ! Lin Zhongqiu stared at the development interface, thinking about what functions the 999th system he developed should have...