If you are worried about the quality and safety of rice flour made with imported rice, you can make your own rice flour easily.
Don't try to make a lot of rice flour at one time, or it will take a long time to dry out. Just make as much as you need each time. ■If you want to dry it out without using an oven, if you spread it out to dry before you go to bed and leave it overnight, it will be quite dry in the morning. ■If using a frying pan, slowly toast the rice over low heat. ■The rice flour readily absorbs moisture and odours just as rice grains do, so store in a tightly sealed jar or ziplock bags.