These are two copies of the Kangnido. The one on the left dates 1402 whilst the one on the right 1420. The Kangnidos bear a close resemblance to the Da Ming Hun Yi Tu, but since the place names appear in its original Mandarin Chinese, much more information could be gathered from it.
The Kangnidos identify thirty-five names indicated on or near the African continent.
Most of these names are derived from Arabic. The lighthouse of Alexandria is clearly visible on the map, with the Mandarin Characters which reads Msir 窶 the Arabic name for Egypt. Between the west coast and the inland water body is an area named Sang-ku, which is believed to be a transliteration of the Arabic word Zangue or Black People. The Kangnido on the right also contains the Chinese transcription Zhebulu hama, which scholars identified as Persianized Arabic Djebel alqamar or "Mountains of the Moon.''
Added to the detail provided in the Da Ming Hun Yi Tu the Kangnidos also identify a river flowing westward in the Southern part of Africa, which corresponds to the Orange River. The addition of this detail on the Atlantic side of the Kangnidos, suggest that the mapmaker could only have gained this information from sources that rounded the Cape of Good Hope.
The landmass protruding on the right hand side of the African continent is believed to be the Arabian Peninsula. The island east of Arabia is named Hai-tao, which apparently represents Sri Lanka (Ceylon). To the east of Sri Lanka, we find the triangular shape of India with a river, believed to be the Ganges River, flowing through it. The long river emerging from the South on the right of the Indian subcontinent is labelled He Shui (窶廝lack River窶?, which refers to the Salween River that flows through the Tibetan plateau. Along the coast from China to Africa, the following major rivers are thus laid out in sequence the Red, Mekong, Menam, Salween, Ganges, Indus, Tigris, and Euphrates.
Contact with Arabs resulted in the use of Arab names on the African east coast as well as northern Africa, however, the knowledge of the interior parts of Southern Africa, even prior to Zheng He窶冱 journeys, remains one of the greatest puzzles emanating from these maps, as well as the Da Ming Hun Yi Tu. The Government of Japan assisted Parliament in locating these maps and the late Prime Minister of Japan, the Honourable Keizo Obuchi, presented a copy of 1402 Kangnido to the Speaker of the National Assembly.
http://www.pmpsa.gov.za/kangnido.html