How to inflate a long balloon evenly?

Long balloons are inflated evenly with their mouths. Grab the inflation port of the long balloon with one hand and the tail of the long balloon with the other. Blow a small bubble in your mouth with a small amount of gas, then pull the big part with your hand several times, and then blow it through your mouth until the balloon bulges but is not hard. Step 4, pinch the inlet tightly and blow the gas in the whole balloon to the top. There is not much gas in the balloon, and the balloon is very elastic, so you can touch it hard.