Japan-Indonesia trip with 20H layover in Beijing

Shabrina, you really do not have to do anything in and from the Japan as far as your right to transit through China is concerned. All you have to do in Japan is to declare, at the time of check-in, that you will travel to Indonesia via Beijing using 24 hour visa free transit. This is all. After a short check, you will be allowed to board the plane.

Upon landing in Beijing the first thing you should do is to approach the 24/144 hour visa free transit counter where you will apply for a temporary entry permit in order to be allowed to exit the airport. This application is free of charge and here you will present your flight tickets and your accommodation booking confirmation if you plan to have a night rest in the hotel. After a short check your temporary entry permit will be granted because you have a very long layover.

Since your flight departs at 17:30, you are advised to re-enter the airport at 15:30. The best detail is that you do not have to perform check-in and you do not have to bother yourselves with the luggage if you travel on a single ticket. So, 2 hours for security and immigration will be enough.

It is perfectly possible to do a half day tour to, preferably, Mutianyu Great Wall section by taking a tour to pick you up from the airport or your hotel at about 08:00 and to return you to the airport or your hotel at about 13:30. Please, just check the internet and I guarantee that you will find such options.

Thank you for your detailed response!