Complex sentence: The rebel leader captures Tjin Hoe and declares that, for being so willing to waste his life the former student must die, locks Tjin Hoe in a coffin and sends him to Shanghai by boat.
Split into simpler sentences: The rebel leader captures Tjin Hoe and declares that the former student must die for being so willing to waste his life. He locks Tjin Hoe in a coffin and sends him to Shanghai by boat.