Actually, from the very moment Hermione made up her mind to apply for a job at the Ministry of Magic, the unfair treatment she would suffer was already destined.
Anyone who goes to work for others is bound to face grievances; encountering such unfair treatment is simply a normal part of society, leaving you utterly powerless, with the only thing to do being to quietly endure it. After all, once you become a mere beast of burden, you have no say from the very beginning—unless you don't want the job anymore.
Similarly, Xu Dong did not teleport inside, because a green gas was floating about the interior. All the laboratory personnel around were wearing oxygen masks. Xu Dong hid himself inside a cabinet in the second-to-last level laboratory.
Chapter 1571