Like all famous historical figures, Zheng He, the greatest navigator in Chinese history, has not escaped controversy. The size of his fleet ships and the routes his voyages took continue to ignite heated debates worldwide. At last week's first international forum on Zheng He's voyages held in Qingdao in East China's Shandong Province to mark the country's third Navigation Day, which coincided with Zheng's historic maiden overseas voyage 600 years ago, scholars and some diplomatic officials to China from the countries which Zheng He's fleet visited, sat together to explore the historic resources of his voyages.