The Euro is the official currency of the European Union. It has been in circulation as electronic currency since 1999 and as physical banknotes and coins since 2002. Its ISO 4217 code is EUR, and it is typically represented by the symbol €. The issuance and management of the Euro are jointly handled by the European Central Bank and the central banks of the individual countries within the Eurozone. Currently, there are banknotes in denominations of 5, 10, 20, 50, 100, 200, and 500 Euros. Additionally, there are coins in values of 1, 2, 5, 10, 20, 50 Euro cents, and 1, 2 Euros. The Euro ranks second globally in terms of trading volume, and all money changers in Hong Kong support the exchange between the Hong Kong Dollar and Euro.

The Russian Ruble (RUB) is the official currency of Russia, first introduced in 1992. It is identified by the ISO 4217 code RUB and is commonly represented by the symbol ₽. The issuance and management of the Russian Ruble are overseen by the Bank of Russia, which is the central bank of the Russian Federation. Currently, circulating banknotes include denominations of 5, 10, 50, 100, 200, 500, 1000, 2000, and 5000 Rubles. There are also coins in denominations of 1, 2, 5, and 10 Rubles, as well as 1, 5, 10, and 50 Kopecks. The Kopeck is the subsidiary currency of the Russian Ruble, with 100 Kopecks being equivalent to 1 Russian Ruble. According to Passto's statistics, there are 8 money changers across Hong Kong where you can buy and sell Russian Ruble.