What's the Use of Me Traveling Back to the Spring and Autumn Period with a Rap System?

Tang Yuan traveled through time, followed the trend and brought a system with him. If you have a system, you have a system. Why is it a rap system? If you want to rap, just rap. If you travel to a parallel world or something, you can become a top rapper, and success will be within your grasp. Ke*ma, where is this, Spring and Autumn! Just like the Spring and Autumn Period and the Warring States Period! How are you doing this? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.