Analysis of information sources in references of the Wikipedia article "Chagatai Khanate" in English language version.
We can find no other record of a Mughul embassy of 1656 to Pekin (...) Nieuhof's report of a Mughul embassy to Peking was taken at face value by C. B. K. Roa Sahib, "Shah Jehan's Embassy to China, 1656 a.d.," Quarterly Journal of the Mythic Society, Silver Jubilee Number XXV (1934-35), 117-21. By examination of the Chinese sources, Luciano Petech concluded that Nieuhof was mistaken in this identification. He argues, quite convincingly, that these were probably emissaries from Turfan in central Asia. See Petech, "La pretesa ambascita di Shah Jahan alia Cina," Rivista degli studi orientali, XXVI (1951), 124-27.