When buying and eating, consumers should pay attention to the following points:

One, look at the label, appearance. First, observe whether the outer packing is clean and tidy, and whether there are rust marks caused by corrosion in the inner and outer walls or cans of the metal cans. The label is complete and clear. The label should be marked with name, factory name, factory site, batching table, net content, solid content, execution standard code, quality grade, and warranty period. Second, it should be determined whether the product is in the warranty period.

Two, prevent "fat listening" and "leaking". Fat listening and missing listening are important external characteristics of canned deterioration. When the canned fruits and vegetables are contaminated by microbes, the "fat hearing" phenomenon of the products is often produced, and the central part of the normal canned and covered iron skin is flat or slightly concave, and there is no leakage. The phenomenon of fat hearing is that the bottom of the canned and the central part of the iron cover is raised. The reason is that the bacteria in the tank breed, the gas is produced, and the pressure in the tank is greater than the air pressure. Leakage is a canned seal with no leakage. In the course of transportation, the products of metal cans are collided with objects, often appearing in the outer wall, and the air is easy to enter, causing the loss and deterioration of the contents, and the products of the above situation can not be eaten. The following methods can be used to check fat listens and leakages: first, see whether the bottom of the tin can be raised and whether there is liquid flowing out. The two is to hit the bottom with the finger joint, cover, the quality of the voice is crisp is normal, the voice is cloudy, the hoarse is fat listens or listens to listen. The three is to squeeze the lid and bottom of the tin. If the liquid is overflowing or squeezed, it can not be restored to its original state.  Glass bottle packaging products, the normal product has a certain degree of vacuum, knocking the bottle cap has a crisp sound, if there is no vacuum, the product is more likely to have quality problems.

Three, look at the quality. For the products packed in glass bottles, the color, state and odor of the contents can be checked, and the block shape of the contents can be observed to be complete, without foreign bodies or turbidity. The canned contents with good quality are natural and fresh colors inherent in the raw food. The shapes and sizes of the canned contents are basically the same, and they are not loose. When buying the canned fruits and vegetables, the color of the fruits and vegetables should not be browned, the sugar water is clear and transparent, in addition to allowing very slight pulp debris to precipitate, no impurities, no suspended matter and turbidity.