Why do people in technical departments of other companies always say that people in technical departments of Guangzhou LG LG LG Display Co., Ltd. can only be cleaners?

Today, I want to quit my job on my first day at LG. I can't take it out when I bring my resume, saying that all A4 papers, no matter who they belong to, can't be taken away, saying that it is for technical confidentiality. Even the camera of the mobile phone should be sealed with stickers before passing through the security inspection machine, and people should also use metal detectors to check. Take out the things and let the Korean leaders sign them. The most important thing is that they confiscated my ID card for the first time and then gave me a temporary card. Seeing that those leaders are also troubled by these information security. I feel that I have no human rights and dignity. I came to work, not to be a thief. So don't come to China to start a company, in case China people learn your technology.