The Grand Yarphese Plan was a social and economic reform plan between 1996 and 1999 in the Grand Yarphese Republic. The plan was initiated in industrial Bangkok, and spread through Yarphei. Led by Trầng Chúp Long, its main motive was to convert the economy into an industrial and service-based modern society of communism, through the process of industrialization and collectivisation. The campaign was based on the Theory of Productive Forces. Since then, Yarphei has taken a path of internal capitalism, with tight control on foreign trade, as a result of the plan's failure.