1. If the glutinous rice balls deteriorate and appear dull, gray, or mildewy, it indicates that the glutinous rice flour is of poor quality or has been stored for too long. The smell should be that of glutinous rice flour and fillings, but not musty, rancid or other odors.

2. It is recommended to try to choose glutinous rice balls made on the same day. When purchasing quick-frozen glutinous rice balls, choose products with little ice residue in the packaging bag, uniform and bright color, no obvious adhesion, complete shape, and no cracks, obvious cracks or powdering.