Is there still a small group available if renting a car to visit the Mutianyu Great Wall is too expensive?

Hiring a private car to visit the Mutianyu Great Wall is a bit expensive. We are six people; do you have any small group tours to recommend? It would be best if the final group didn’t exceed ten people, of course, the fewer the better. I’m waiting for your recommendations.
Yes, you can book the Zan Bus mini-group, which is the Great Wall Express Bus. It directly reaches the foot of the Great Wall without stopping or getting stuck in traffic. Reaching the Great Wall is simple and convenient. Book online the “Zan Bus,” and if traveling with a group, you can book the Zan Bus 8-person mini-group for more flexibility and a very good experience. The price is economical and not expensive.
Yes, you can book the Zan Bus mini group, take the Great Wall Express Zan Bus, directly to the foot of the Great Wall without stopping or traffic jam in between, reaching the Great Wall simply and conveniently. Book the “Zan Bus” online, and for groups traveling together, you can book the Zan Bus 8-person mini group, which offers more freedom and a very good experience. The price is economical and reasonable, not expensive.