Careri traveled through Persia and Armenia, visited southern India and then went on to China. His route was so unusual that Jesuit missionaries under the Roman Curia mistakenly believed him to be a spy sent by the Pope and helped arrange an audience for him with the Emperor Kangxi in Beijing. He even attended Lantern Festival ceremonies and toured the Great Wall.
當他穿越波斯、亞美尼亞，再經由南印度來到中國時，由於旅遊行徑太不尋常，以致當時隸屬於羅馬教廷的耶穌會傳教士，竟誤認他此行是為了來替教宗從事間諜工作，因此協助他到北京去覲見清康熙皇帝，還獲邀參加元宵節慶典並參觀長城。