Complex sentence: He was then sent to Chengdu in Sichuan, where he arrived in August 1632 and began a close association with fellow jesuit Lodovico Buglio, and began to learn Chinese under Buglio's guidance.
Split into simpler sentences: He was then sent to Chengdu in Sichuan and arrived in August 1632. He began a close association with fellow jesuit Lodovico Buglio, and started to learn Chinese under Buglio's guidance.