In Book 3 of Years of Rice and Salt the character Admiral Kheim is introduced. Admiral Kheim is a fictional character, however their are some striking similarities between him and another Chinese Admiral named Zeng He. Admiral Kheim has an explorer like instict and in a way it seem like he enjoyes finding the new land and peoples that are described in the book. Zeng He was an actual Chinese explorer and he sailed many parts of the globe much like Admiral Kheim did in Book III of Years of Rice and Salt.

Wikipedia, Zeng He
According to Wikipedia:

Zheng He (Traditional Chinese: 鄭和; Simplified Chinese: 郑和; Hanyu Pinyin: Zhèng Hé; Wade-Giles: Cheng Ho; Birth name: 馬三寶 / 马三宝; pinyin: Mǎ Sānbǎo; Arabic name: حجّي محمود Hajji Mahmud) (1371–1433), was a famous Chinese mariner, explorer, diplomat and fleet admiral, who made the voyages collectively referred to as the travels of "Eunuch Sanbao to the Western Ocean" (Chinese: 三保太監下西洋) or "Zheng He to the Western Ocean", from 1405 to 1433.
Zheng He was born in 1371 of the Hui ethnic group and the Muslim faith in modern-day Yunnan Province, one of the last possessions of the Mongols of the Yuan Dynasty before being conquered by the Ming Dynasty. He served as a close confidant of the Yongle Emperor of China (reigned 1403–1424), the third emperor of the Ming Dynasty. According to his biography in the History of Ming, he was originally named Ma Sanbao (馬三保), and came from Kunyang (昆阳), present day JinningYunnan Province. Zheng belonged to the Semur or Semu caste who practiced Islam. He was the sixth generation descendant of Sayyid Ajjal Shams al-Din Omar, a famous Yuan governor of the Yunnan Province from Bukhara in modern day Uzbekistan. His family name "Ma" came from Shams al-Din's fifth son Masuh. Both his father Mir Tekin and grandfather Charameddin had travelled on pilgrimage to Mecca. Their travels contributed much to the young boy's education. He grew up speaking Arabic and Chinese, learning much about the world to the west and its geography and customs. After the Ming army conquered Yunnan, he was taken captive as a young boy in 1381, and castrated, thus becoming a eunuch, to become a servant at the Imperial court. The name Zheng He was given by the Yongle emperor for the war merit in the Yongle rebellion against the Jianwen Emperor. He studied at Nanjing Taixue (The Imperial Central College). Zheng He travelled to Mecca, though he did not peform the pilgrimage itself. His tomb was recently (at the beginning of the 1980's) renovated in a more Islamic style, although he himself was buried at sea. The PRC government uses him as a model to integrate the Muslim minority into the Chinese nation. He himself was a living example of religious tolerance, perhaps even syncretism. The Galle Trilingual Inscription set up by Zheng He around 1410 in Sri Lanka records the offerings he made at a Buddhist[1]. In around 1431, he set up a commemorative pillar at the temple of the Taoist goddess Tian Fei, the Celestial Spouse, in Fujian province, to whom he and his sailors prayed for safety at sea [2]. This pillar records his veneration for the goddess and his belief in her divine protection, as well as a few details about his voyages [3]. Visitors to the Jinghaisi (静海寺）in Nanjing are reminded of the donations Zheng He made to this non-Muslim institution.
Between 1405 and 1433, the Ming government sponsored a series of seven naval expeditions. Emperor Yongle designed them to establish a Chinese presence, impose imperial control over trade, and impress foreign peoples in the Indian Ocean basin. He also might have wanted to extend the tributary system, by which Chinese dynasties traditionally recognized foreign peoples. Zheng He was placed as the admiral in control of the huge fleet and armed forces that undertook these expeditions. Zheng He's first voyage consisted of a fleet of 317 ships holding almost twenty-eight thousand armed troops. Many of these ships were mammoth nine-masted "treasure ships" which were by far the largest marine craft the world had ever seen. On the first three voyages, Zheng He visited southeast Asia, India, and Ceylon. The fourth expedition went to the Persian Gulf and Arabia, and later expeditions ventured down the east African coast, as far as Malindi in what is now Kenya. Throughout his travels, Zheng He liberally dispensed Chinese gifts of silk, porcelain, and other goods. In return, he received rich and unusual presents from his hosts, including African zebras and giraffes that ended their days in the Ming imperial zoo. Zheng He and his company paid respects to local deities and customs, and in Ceylon they erected a monument honouring Buddha, Allah, and Vishnu. Zheng He generally sought to attain his goals through diplomacy, and his large army awed most would-be enemies into submission. But a contemporary reported that Zheng He "walked like a tiger", and did not shrink from violence when he considered it necessary to impress foreign peoples with China's military might. He ruthlessly suppressed pirates who had long plagued Chinese and southeast Asian waters. He also intervened in a civil disturbance in order to establish his authority in Ceylon, and he made displays of military force when local officials threatened his fleet in Arabia and east Africa. From his fourth voyage, He brought envoys from thirty states who traveled to China and paid their respects at the Ming court. In 1424, the Yongle Emperor died. His successor, the Hongxi Emperor (reigned 1424–1425), decided to curb the influence at court. Zheng He made one more voyage under the Xuande Emperor (reigned 1426–1435), but after that Chinese treasure ship fleets ended. Zheng He died during the treasure fleet's last voyage. Although he has a tomb in China, it is empty: he was, like many great admirals, buried at sea.[4] Zheng He, on his seven voyages, successfully relocated large numbers of Chinese Muslims to Malacca, Palembang, Surabaya and other places and converted the natives to Islam.[citation needed] Malacca became the center of Islamic learning and also a large international Islamic trade center of the southern seas. His missions showed impressive demonstrations of organizational capability and technological might, but did not lead to significant trade, since Zheng He was an admiral and an official, not a merchant. Chinese merchants continued to trade in Japan and southeast Asia, but Imperial officials gave up any plans to maintain a Chinese presence in the Indian Ocean and even destroyed most of the nautical charts that Zheng He had carefully prepared.[citation needed] The decommissioned treasure ships sat in harbors until they rotted away, and Chinese craftsmen forgot the technology of building such large vessels.[citation needed]

(晋宁), mountain temple

Wikipedi, Zeng He
Accessed on Feb. 9, 2007

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