1. Please carefully check the product number,packaging specification, quantity, appearance (for damage, leakage, pollution,etc.) when receiving the goods. If everything is correct, please sign on theshipping packing list for confirmation. If you find any problems, if the goodsare sent by the courier company, please indicate on the shipping packing listwhen you receive the goods, and return the goods together with the packing listto the courier company. If the goods are sent by mail, please Contact thecustomer service staff of Hechang Chemical within 3 working days afterreceiving the goods, and attach the relevant physical photos that can clearlyreflect the problem for our reference and processing.

2. Hechang Chemical guarantees that the goods received by the user areconsistent with the indicators on the technical specifications of the product.If the product has a clear expiry date, Hechang Chemical will guarantee thequality of the product before the expiry date, provided that the user keeps itproperly in accordance with the storage conditions and the goods are not openedduring the storage period. If the product does not have a clear expiry date,Hechang Chemical will guarantee the product quality for two years, providedthat the user keeps it properly in accordance with the storage conditions andthe goods are not opened during the storage period. In the meantime, if usershave any questions about product quality, please contact Hechang Chemical'scustomer service staff, and provide detailed explanations of the experimentalmodel and use process, experimental results, analysis data and otherinformation for our reference and processing.

3. Regarding product quality and delivery, if the user does not raise anobjection within the above-mentioned prescribed period, the user shall bedeemed to have approved the product as qualified.