There was no definite answer to the question of which online novel had the longest serial time because the length of the serial depended on the author and the bookstore, and different novels might be serialised on different platforms. However, according to the statistics of some online novels," Battle Through the Heavens " was currently one of the longest-running online novels. It had been published on the online literature platform for 13 years and had published a total of 11 novels. This novel was created by Tian Can Tu Dou and was hailed as a classic in the online literature world.