Acid-base treatment method: First, immerse the orange segments in 0.5~0.8% hydrochloric acid for 30~40min (25~35℃), take them out, wash them 2~3 times with clean water, wash away the acid, and filter them dry. ;The ratio of orange slices to acid solution is 1:1.3. Stir slightly during processing, then immerse the acid-treated orange segments in 0.3~0.5 sodium hydroxide solution, soak at 25~35°C for 8~12 minutes, so that most of the capsule coating has been dissolved, quickly take it out and use clean water Wash 3 to 4 times, rinse with lye, and make sure it is not too slippery. Wash the peeled orange slices with clean water for 1 to 2 hours. During this period, change the water every 15-20 minutes. Be sure to wash away the residual alkali solution and make sure the orange slices are not slippery.