Passport control officers come on board to check passports and visas. The customs declaration forms are distributed on board the train and will be given to the customs officer on request. At the Finnish-Russian border, checks are carried out while the train is moving. At the Russian-Mongolian/Chinese border, the train will stop for about 4-5 hours. It is a good idea to visit the toilets well before the train arrives at the border, as they will be closed during border formalities. Toilets are also closed before and after stations.