Internal training cultivates the five internal organs and six fu, while external training refines the skin, flesh, tendons, and bones.,Three years ago, the current Sect Master of Zhenwu Holy Sect cultivated to the peak of Saint Vein Realm. In order to seek that last glimmer of hope to enter the God Vein Realm, .,Before the age of fifteen, the meridians and internal organs in a human body are not yet fully formed, making them more vulnerable and less suitable for cultivation.。