Exiled prince

Li Jun was the crown prince of the empire, however during his coronation his younger brother stormed in claiming the crown. Li Jun was mistreated by his brother in the palace prison, however during his transfer to another cell, he managed to escape towards the city. The image of the young prince was that of dirt and tears, he took refuge in the streets and did everything possible not to be recognized, since his brother ordered to bring him dead or alive. One day you help him and he says "Thanks"