Excuse me, where is a good tour group for the elderly in Beijing?

My parents like traveling in the mountains very much. After retirement, they have nothing to do and always want to go out for a walk. I have reported many elderly travel platforms to them. To sum up, my parents' best impression of a platform is called Xiang Xerox. When I was young, I suffered too much. When I get old, I want to enjoy it. The most important thing for a tour group is service. After all, people all over the world have been there, and traveling just wants to relax. The services of some travel agencies are really not very good. They like to run around and rush to the next scenic spot. My parents have followed me several times and have always been considerate service. Because of good planning, the old people are particularly comfortable to play with. Look at the green hills of the motherland, taste the delicious food from all over the country and meet friends of the same age. I'm happy every time.