You are talking about places that foreigners like to go, not places where foreigners do business.

I mentioned a few places where foreigners live: Yabao Road, Hongqiao, Wangjing, CBD, Houhai ... These places are frequented by foreigners. I guess you are looking for a place with many foreigners to sell your products to them.

Yabao Road: There are many floating people, and foreigners shop there;

So is Hongqiao. There are many Europeans, many East Asians and many Japanese.

Jing Wong: There are many Koreans, and there are also many Europeans dealing with Koreans.

CBD: People who work in China generally have residence permits, most of which are introduced by non-government (such as company invitation), and many of them try to work here with tourist visas;

Houhai: Bar Street, where foreigners all over Beijing like to find friends.