1. Make a local call to inquire about the service.
Call the local telephone directly to inquire about the service, such as "1 14" and "1 16", and enter the company name or address according to the prompt to find the telephone number.
2, query in the search engine
Enter company name or keyword in search engine or yellow pages website for search query.
3. Log in to official website.
Log on to official website or social media to find contact information or customer service phone number.
4. Consult relevant departments or institutions.
Consult relevant departments or institutions, such as local commerce bureau, people's government, industry and commerce bureau, etc. , or consult the local telephone business hall.
5, the unit on-site query
If you know the company address, you can also go to the company to check the phone.
Common information retrieval methods are:
1, sequential search method
It is generally used for comprehensive retrieval of major topics and research topics in the development history of various disciplines and emerging disciplines.
2. Backward search method
The purpose is to obtain the latest literature information published recently. It is the most commonly used method for general researchers. When confirming whether an achievement is innovative, it is also suitable to use backward inquiry method.
3. Spot check method
Spot check focuses on searching for a certain period of time and is mostly used to retrieve special investigation reports.