My System Can Be Upgraded

Dongfang Ce traveled through time with a mutated system, and was asked by the system to stay in the mountains for ten years! It has been ten years. Do you know how I have lived these ten years? If you're not reading, you're planting flowers and trees, raising dragons and phoenixes! Finally, after ten years, I completed the system's tasks. I thought I could go down the mountain in glory, but unexpectedly, the system suddenly fell asleep! The reason is that someone else traveled through time with the system, and his system level is actually higher than mine! Finally, I discovered that there are so many systems in this world! And my system can swallow other systems, upgrade! See how my system becomes the most powerful system in the world! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.