How do people KNOW about zheng he adventures?

People know about Zheng He's adventures primarily through historical texts, records, and accounts written during and after his voyages in the early 15th century. Chinese historical documents, such as the "Ming Shilu" (Ming Annals), provide details about his travels, diplomatic missions, and trade expeditions across the Indian ocean. Additionally, accounts from foreign observers and later historians have contributed to the understanding of his impact on maritime exploration and cultural exchange. Archaeological findings and artifacts from the period also offer insights into his notable expeditions.