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Query

Please scratch the gray coating on the security label, enter the security code in the input box, and then click the query key.
The command output is as follows:
1. If correct, the prompt is "Dear customer, what you bought is the product produced by Shanghai Lidun. It belongs to the genuine product, please rest assured to use it".
2, if there is an error, the prompt is "the security code you entered does not exist, beware of counterfeit".
3, if the query, the prompt is "this product has been queried, this is the first query, beware of counterfeit".