Complex sentence: Eventually he reached the palaces of Liu Ju and Empress Wei, created so much digging that there were barely any space to lay a bed, and announced that he found overwhelming evidence of crime particularly at the Crown Prince's household.
Split into simpler sentences: Eventually he reached the palaces of Liu Ju and Empress Wei, engaged in so much digging that there were barely any space to lay a bed. He then announced that he found overwhelming evidence of crime particularly at the Crown Prince's household.