If it is a debit card with ICBC UnionPay logo bound by ICBC app, you can withdraw ruble cash from Russian ATM for use. Or in the shopping mall with the UnionPay logo, swipe your card for consumption. China tourists like Moscow and St. Petersburg go to many big cities, and many big shopping malls can use the debit card marked by UnionPay.
The ruble is the legal tender of the Russian Federation and is issued by the Central Bank of the Russian Federation. It is also the legal tender of Abkhazia and South Ossetia, and Belarus and the left bank of Transnistria also use the same currency name. The auxiliary unit of ruble is "Gaby", 1 ruble = 100 Gaby.