Phan Bội Châu assistance from China, but the country was forced to abandon its suzerain relationship with Vietnam after the 1884–85 Sino-French War. Phan and Cường Để decided to seek aid from Japan, which had recently won a war against Russia, had successfully imposed reforms and seemed more inclined to help out revolutionaries in a nearby Asian country. Phan was selected to visit Japan to secure the funds needed to sustain Duy Tân Hội. Phan did not speak Japanese and had no contacts in Japan, so he sought help from Liang Qichao, who was living in Japan since being exiled years earlier. Liang
Phu Kao–Phu Phan Kham National Park Bua Lamphu Province. The park's area is . The park's western section is located in the Phu Kao mountain range and the eastern section in the Phu Phan Kham mountain range of the Phu Phan Mountains. The park's western section is home to numerous caves hosting prehistoric rock paintings such as Tham Palan Hai, Tham Muem and Tham Rakha Khanit. Ancient artifacts of the Ban Chiang era have also been discovered in the area. The rock paintings and artifacts are estimated at more than 3,500 years old. In 1985 the park was established as Thailand's 50th national park. Part of