What does metaphysics mean by burping?

In metaphysics, burping is the sound that the immortal wants to talk, and the actual reason is that the gas in the stomach rushes to the throat. Its long and slow sound is related to mental stress, stress, poor diet, living habits, reflux esophagitis, digestive tract ulcer and other diseases. I suggest you work and rest on time, don't stay up late, eat regularly, eat less and eat more meals, don't overeat, and eat less spicy and irritating foods that are easy to produce gas. This answer is for reference only. Don't be blindly superstitious.