Trust you guys are aware that Hengyuan uses at least 16% of Russian Crude in their feed in 2021. After 22 Dec 21' it can fully utilize any crude it wants as the COSA agreement made in 2016 with Shell expires.
Found this interesting tool:
The Twitter bot tracking Russian oil and gas tankers in real time
https://www.protocol.com/climate/russian-tanker-tracking-greenpeace
https://twitter.com/RUTankerTracker
Batch in April 22:
Batch in May'22
Above is a no brainer considering the discount againts Brent (now hitting close to 40 USD/brl).
https://www.statista.com/statistics/1298092/urals-brent-price-difference-daily/