HENGYUAN (4324) HENGYUAN REFINING COMPANY BERHAD - 2 pictures says a thousand word
The crack spread - the margin itself:
The 10 - year agreement to determine the margin:
https://klse.i3investor.com/web/blog/detail/2017/2022-05-07-story-h1622469652-Hengyuan_2_pictures_says_a_thousand_word