  I present a quick and sound method for the robustness verification of a sort
of quantum classifiers who are Linear Sound. Since quantum machine learning has
been put into practice in relevant fields and Linear Sound Property, LSP is a
pervasive property, the method could be universally applied. I implemented my
method with a Quantum Convolutional Neural Network, QCNN using MindQuantum,
Huawei and successfully verified its robustness when classifying MNIST dataset.
