From Frankfurt, take the train to Koblenz, then take the train to Trier (or Luxembourg) and get off at Cochem (Mosel). This is a small town (only 50,000 residents) and is a very leisurely resort. Shopping or drinking in the city is mostly foreigners, few Chinese (Chinese tour groups are almost no). The castle is a must-see attraction here, and the cruise ship to browse the Mosel is a compulsory course. If you have time and energy, renting a bicycle to ride along the river is also a good choice. Come to Kochm for at least 2 days to enjoy the view and daze. If you live for more than 4 days, take a train to Luxembourg and make a day trip to and from the sightseeing trip. In addition, you can also take a train to Fort Elez (P15) for sightseeing. Alternatively, you can also take a train to and from Trier, where Marx's former residence is memorial, and the Black Gate monuments included in the World Heritage Project. Whatever the length of your stay, as long as you have been to Kochm, it will be a worthwhile trip.