What is the ruling on burping and the subsequent feeling of food taste or the expulsion of food remnants and swallowing them while fasting?

Belching during fasting does not invalidate it. It is a sound accompanied by gas that comes out of the mouth due to a full stomach, and it does not affect the fast even if the fasting person tastes food in their mouth. However, if some food rises to the throat and the fasting person swallows it intentionally, their fast is broken, and they must make up for it. But if they swallowed it unintentionally or out of ignorance of the ruling, then there is no blame upon them.