A China's trade company exported a batch of cannabis ( 大麻 ) to Germany. It is specified in the contract that moisture, 15% max; admixtures (杂质) , 3% max. But we have sent the sample to the buyer before the transaction is concluded. We also telephoned the buyer that the delivered goods are similar to the sample after contracting. After the goods arriv ed in Germany, the buyer provided an inspection certificate stating that the quality of t h e goods is lower than that of the sample by 7%, and according to this, they also claimed for 600 pounds as the compensation against the losses. Question: 1) Could we ignore the claim for the reason that the deal was not conducted based on sale by sample? 2) What can we learn from the case?