Chinese banks have begun blocking payments from Russian companies for electronic component purchases since late March, the Russian state-controlled media outlet Kommersant reported on April 12.

In February, China's Chouzhou Commercial Bank ended operations in Russia and Belarus, while three other major Chinese banks stopped accepting any payments from sanctioned Russian institutions.

https://kyivindependent.com/russian-media-chinese-banks-begin-blocking-payments-from-russia-for-electronic-parts/