However the advertisement boasts the products, it cannot effectively guarantee the quality of commodities.

无论广告如何夸张产品，它都不能保证商品的质量。

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To tighten the quality control of commodities purchased is an important factor in ensuring the quality of final products, and an important link of the chain of quality control.

把住源头，对采购商品质量进行严格管理与控制，是确保最终产品质量和保证生产顺利进行的重要条件，也是企业加强质量管理、建立完善的质量管理体系的重要环节。

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Products sold without service are commodities and after quality, the only determinant left is price.

FORBES: The Next Big Product to Become Obsolete