I want to go to the job fair in Shanghai for an interview (that is, Ten Thousand People Stadium), mainly because I want to join a foreign company

Go ahead and give it a try. Don’t be afraid. If you don’t give it a try, how will you know if you can do it? You can look at the company name. For example, if a domestic company is a domestic company, the name is Shanghai** **. A limited company is generally a foreign company. *(Shanghai) Co., Ltd. If you can see a copy of the other party's business license, you can see the registered capital. If it is registered in US dollars, it is a foreign-invested enterprise.

There are also foreign-funded companies that do not necessarily require you to be fluent in English. It depends on your actual work situation and what position you are applying for.