/ This is the official website of BBK for mobile phones

/ This is the official website of BBK, similar to the website of the head office. (Including all BBK products, such as mobile phones, landlines, audio and video products, etc.) Like a navigation page.

/ This is the official website of BBK Education

They introduce it in professional websites, such as the official website of mobile phones, which only talks about mobile phone products and not others.

Hope this helps