There are two ways to do it: with water and with oil. From the sensory point of view is from big bubbles to small bubbles, and the sugar liquid a little discoloration (light yellow), basically it is OK. The best way to identify is: put a bowl of water next to it, use chopsticks to dip a little bit of sugar liquid drops into the water, take out and taste the crunchy feeling, do not stain the teeth on the right. There is also the most important thing to pay attention to the plucking, the plucked should be warm, so that the temperature difference between the two leads to the sugar solution does not stick to the fruits and vegetables, especially when the simmering sugar solution is too little.