The climate in Myanmar is generally around ten to twenty degrees throughout the year, allowing for two to three rice crops annually. This fertile land is something Tang Qing didn't want to pass up and he plans for it to be a significant food-producing area in the future.
Many areas are still undeveloped and wild. Tang Qing arbitrarily divided half of it for cultivation of food and cash crops, while the other half has plenty of mines. Coupled with the picturesque landscape, he decided to preserve these natural scenes for future tourism development. If everything were to be cultivated for food crops, it would seem odd.
This is not a farm after all.