When traveling to Russia, what is the voltage of the local hotel? Do I need to bring a conversion plug?

The rated voltage in Russia is 220V, 50HZ, which is the same as that in China, and there is no need to bring a transformer.

Russia uses European plugs (two cylindrical pins, picture below):

It is different from the domestic socket type. The national standard plug cannot be used directly, so a conversion is required. Plug:

Note that the Russian socket is recessed, so you need to protrude the conversion plug to insert it into the socket, such as Banpu LE-07.