You must be a person who is in a hurry to blow the fan. Usually, half an hour after exercise, the breath is completely calm before you can eat, blow and take a shower. Xiang Gong particularly emphasized this point.
Sweating slightly after practice shows that the yang in the body has been mobilized and is helping you detoxify through sweat. So this is also good.
I don't blow for half an hour, mainly because I'm worried about catching cold and foreign evils entering the body from the open skin.
As far as I know, I haven't calmed down after practicing for half an hour. I have a bad appetite and feel uncomfortable after eating. Hong Guang's meridian exercise should have a similar truth.
I hope I can help you!