The King of Thailand discovered that many counties and remote areas had faced problems because of drought. In particular, Thai farmers were not be able to produce the crops. Consequently, crops would be damaged or not as productive both of which resulted in economic losses. After that, this project debuted on July 20, 1969 as designed according to his plans. The first rainmaking process was done at Khao Yai National Park by scattering dry ice flakes over the top of cloud in the sky which resulted in rain falling.