Liechtenstein is also known as the "stamp kingdom", but we didn't watch a stamp because on Saturday, almost all the shops were closed, and foreigners enjoyed the first and the second. Fortunately, there is a small shop open, there is a mint machine at the door, the commemorative coin is a big love of Shanghai, 1 yuan + 5 points can be cast. Most of the guides' introductions to this country have been forgotten, and they have remembered two: the castle hangs the flag indicating that the king is at home, and if he does not hang, he will go on a trip (the country is not at home this day); there is only one police dog in the whole country (isn't this dog retired? Have you found a successor dog?)