Group 1 - The core viewpoint of the article highlights the impact of the global pandemic and oil price wars on the oil sector, leading to a significant decrease in demand and an increase in supply, resulting in historically low oil prices in 2020. However, the sector did not experience a collective profit increase due to new revenue recognition standards affecting costs and the negative impact of RMB appreciation on gross margins [1] Group 2 - In 2021-2022, various countries implemented economic stimulus policies that fueled inflation and kept crude oil prices high, continuing to pressure sector profits in 2021. In 2022, oil prices rose further, but due to successful price adjustments and operational improvements by companies, profit margin fluctuations began to narrow, and some companies experienced a profit margin reversal [1]