What is "tongpan"

Tongpan is a 1977 Thai 16 mm black-and-white docudrama that re-creates a seminar that took place in Northeast Thailand in 1975 to discuss the proposed Pa-Mong Dam on the Mekong. Interwoven are sequences depicting a poor farmer, Tongpan, who had lost his land to another dam some years before, and his struggles to make ends meet. Because of the film's socialist message and suspected communist sympathies of the filmmakers, it was banned by the Thai government. The 63-minute film was released on VCD in Thailand in 2006.