Is there any hidden value in the century-old book recommended by Bank of Beijing by telephone?

Very valuable.

However, the premise must be authorized by the People's Bank of China, and the People's Bank of China is authorized by the state to design and manufacture the national mint, and the national bank plans to issue the legal tender in a unified way. Commemorative coins all have collection value, but they vary according to the number, particularity and scarcity of issuance. If you want more appreciation space in the future, you can choose commemorative coins issued on special days, but commemorative coins may also depreciate. Commemorative coins are legal tender and can be divided into precious metal commemorative coins and ordinary commemorative coins. Precious metal commemorative coins cannot be circulated, and commemorative coins are made of various materials, mostly alloys.

But at the same time, in order to prevent being cheated, make sure it's the Bank of Beijing.