Star Soul Bond Master

In order to resist the alien race, Li Sheng, the strongest man in the Star Blue Continent, dragged himself and the alien race into a different space to buy time for the human race. As a result, he was stabbed in the back by his most trusted and only disciple, and was sealed in a different space using a formation. He has been unable to escape from the trap to this day. Li Sheng tried his best to practice the trumpet again, but in the end, the trumpet became the apprentice's most trusted successor?