burn one's boats

In the dim space, there was no alternation between day and night, and it was impossible to calculate time. Andrew Yun didn't know how long he had stayed here. In his heart, there was only the obsession of trying his best to get out of here. And the first step was to do his best to recover from the injuries on his body.
With the medicine he prepared himself, the Purple pulse crystal, and the recovery ability granted by the Great Dao Fu Tu Jue, Andrew Yun's injuries recovered very quickly, and...