During his expeditions, Ma Huan took notes about the geography, politics, weather conditions, environment, economy, local customs, even method of punishment for criminals.
Während seiner Expeditionen nahm Ma Huan von Geographie, Politik, Wetter, Umwelt, Wirtschaft, lokalen Sitten und Gebräuchen, ja sogar von Bestrafungsmethoden für Kriminelle Notiz.