My Water Element Clone

“I’m leaving you with the task of saving humanity’s future.” The old man patted his shoulder and spoke earnestly. He nodded firmly, then turned away without hesitation. He would return to the past, end the drought, and save the world. Later, he gained the ability to transform into water and acquired a bizarre System called the Water Realm. His name was Xie Cheng. He was a Water Man, and the greatest repairman the world had ever seen!