How to choose canned food?

Observe whether the packaging is complete, whether there is leakage, can lid, cap rust, abrasions, whether the trademark oil immersion.
Do not buy "fat to listen to" the
Observe the bottom of the tank, the lid or the cap. Can lid, cap slightly concave better, if found can lid, bottle bulge out do not buy.
Sound crisp and bright
Hand bomb hit the lid, the sound crisp when the quality, and voiced that has deteriorated.
Trademark should be complete
Observe the production date and shelf life of the product, the trademark is not complete or near the shelf life of goods to be careful when buying.
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