The important thing to consider when hiring a translation service is the price. If you do not know what you are looking for and all the options you looked the same then it is reasonable to go with your inexpensive option.
A better point of consideration when making your choice lies in the work of each company provides. Quality is also a difficult point to consider because the translation is not only a subjective process but you will also be able to personally evaluate the final product. If you are searching for professional Chinese translation services then you can navigate various online sources.
You can indirectly evaluate the quality of the company you hire to inspect the work they have produced in the past and by seeking referrals. Go through your network and find out who had hired translation companies in the past and who they would recommend.
Look at the official documents of the prospective company has manufactured and find independent reviews of the translation by a qualified evaluator. With recognized translation companies past performance is the best indicator of future performance.
To promote their business in China, and to convince people to buy their products, they will have to use the language in the country. Not only in China, but this trend is also visible in many countries another non-English speaking. If a business wants to home in the heart of the audience in the country, it must use the domestic language of the region.