Why is there a prompt in Chinese and English when the phone is not answered?

English is the first foreign language in our country. I have learned English for so many years since I was a child. In the future, work will also be a top priority, which shows its status. In China, bilingual communication in Chinese and English is basically adopted, so it is not surprising that there are prompts in Chinese and English. This should be learned from foreign countries. It just depends on which other languages ??besides the mother tongue are the most important and commonly used in each country.