1. Relatives, friends and colleagues: Those who have been renovated or are familiar with the renovation are your main contact objects. Try to get them to introduce you to some good companies they know.

2. Radio, TV and newspapers: Don't just pay attention to advertisements, but also pay special attention to some negative reports to exclude some bad companies.

3. Inquire about relevant information online: Many netizens will communicate with each other in various decoration forums, and this information is very useful.

If you want to know which company is better, you will basically understand it according to these and then compare it.