There is a professional technical document to be translated into Chinese, which needs manual translation. Which translation company is better?

Well, I don't know where you are, so I can't recommend the company directly.

However, you can screen translation companies that meet your needs through the following aspects, hoping to help you:

1. First, check whether there are complete industrial and commercial qualifications, such as business licenses, and whether there are translation services within the business scope of business licenses. If you can't even provide a business license, don't even think about it. Just pretend it never happened.

2. It depends on how long the translation company has been established and can operate for several years, ten years or twenty years. Needless to say, most of them are formal units, and if they are not formal, they will be dissolved soon.

3. Look at the quality of the translation and see if it passes the test. This can be verified by trial translation, which is now provided by most companies (the number of words is generally limited, mostly between 200 and 500 words).

4. You can also check the reputation of the translation company, online, or find someone nearby.