"Sigh of Immortals" also known as "The Story of Liyun"
Heaven and Earth have always had a peaceful and symbiotic relationship. Heaven sent cultivation methods to Earth, and Earth sent gems and gold to Heaven. That realm has always been peaceful, but twelve years ago, Earth suddenly launched a war against Heaven. The reason is unknown. Countless young people rushed to the battlefield, but there was no way that the difference in strength was too big. The court of Earth became Heaven's territory, and Earth has been living in fear.