Phan Bội Châu became a teaching text at the Tonkin Free School in Hanoi, a school run by Phan's contemporaries to promote the independence movement. However, Phan did not receive much of a reaction in terms of aid towards his independence efforts, since the book made Chinese readers worry about their own future. The book had a much better reception among Vietnamese readers. Phan and a colleague, Đặng Tử Kính, left Japan for the first time in August 1905, carrying 50 copies of the book that were to distributed throughout Vietnam, of which further copies were made inside the country. Phan's direct writing
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