The first one is to contact customer service.
The second is the simplest and most effective one:
1. After opening Baidu map, find the "Mark" button on the map toolbar.
2. Click the "Mark" button, then find the location of your company on the map and mark it.
3. After saving the label, a bubble window with "share" will pop up. Click this share.
Baidu will give you a link.
You only need to send the whole link to others, and others can see your company when they visit the link.