1. Prepare a thin colander, put the swallows in it, and then put them in the water pipe for washing (note: don't run too fast when washing). After the swallows are cleaned, put them into a large bowl prepared in advance, soak them in appropriate amount of water (mineral water or cold boiled water is best), and remember to change the water at least three times in the middle, so that the swallows will be cleaned.

2. The efficacy of Xueyan:

(1) Snow weir has a good effect on improving the condition of diabetes, and diabetic patients can eat some properly at ordinary times.

(2) For friends who lose weight, if you can eat some snow swallows properly, the effect of slimming will be more obvious. So friends who want to lose weight can also try.

(3) It is very important to control the condition of patients with hypertension. For this kind of patients, you can also eat some snow swallows properly, because snow swallows have a good effect on lowering blood pressure.