How many days does it take to join a travel agency to travel to many European countries?

Search "Europe to Europe". There are three routes to Eastern Europe, Western Europe and Northern Europe. You can combine yourself, get on and off at any time, and pick it up at the airport railway station. 7 days for single track and 0/3 days for double track combination. If all three lines go, it will be 20 days. But there will be about half a day in the middle to coincide with the previous route, because you need to transfer to another direction! I usually take you to Germany for exchange, but the delay is not too much, and the problem is not big!

Their price is ok. The three-star hotel includes breakfast, full bus and Chinese tour guide. That is, tour guides and drivers have to charge a tip of 5 euros a day, which is a bit reluctant!