Complex sentence: He first negotiated the terms for peaceful co-existence with the native Di and Qiang tribes, then made arrangements to purchase livestock from them and distribute the livestock among the refugees to help them regain their means of livelihood.
Split into simpler sentences: He first negotiated the terms for peaceful co-existence with the native Di and Qiang tribes, and made arrangements to purchase livestock from them. He then distributed the livestock among the refugees to help them regain their means of livelihood.