Core Viewpoint - The domestic internal combustion engine sales experienced significant declines in February 2026, influenced by the Spring Festival holiday, leading to reduced market activity and fewer effective working days [1]. Group 1: Internal Combustion Engine Sales - In February 2026, domestic internal combustion engine sales reached 2.9469 million units, a month-on-month decrease of 37.87% and a year-on-year decrease of 17.96%. Cumulative sales for January-February were 7.6904 million units, showing a slight year-on-year increase of 0.35% [1]. - Diesel engine sales in February 2026 totaled 375,400 units, with a month-on-month decline of 27.05% and a year-on-year decline of 9.01%. Cumulative sales for January-February were 890,000 units, reflecting a year-on-year growth of 7.93% [1]. Group 2: Multi-Cylinder Diesel Engine Performance - In February 2026, multi-cylinder diesel engine sales reached 317,400 units, with a month-on-month decrease of 25.48% and a year-on-year decrease of 7.30%. Cumulative sales for January-February were 743,300 units, showing a year-on-year increase of 9.18% [5]. - The top ten companies in multi-cylinder diesel engine sales accounted for 79.31% of total sales, with slight declines compared to January [5][8]. Group 3: Company Rankings and Sales - Weichai maintained its position as the top seller of multi-cylinder diesel engines in February 2026, with sales of 72,100 units, followed by Yuchai with 49,000 units and Yunnei Power with 26,100 units [7]. - For January-February 2026, Weichai's cumulative sales reached 155,600 units, achieving a year-on-year growth of 15.25% and a market share of 20.93% [8]. - Yuchai ranked second with cumulative sales of 111,000 units, reflecting a year-on-year growth of 22.86% and a market share of 14.93% [8]. Group 4: Commercial Vehicle Multi-Cylinder Diesel Engine Sales - In February 2026, commercial vehicle multi-cylinder diesel engine sales totaled 157,100 units, with a month-on-month decline of 18.89% but a year-on-year increase of 3.86%. Cumulative sales for January-February were 350,900 units, showing a year-on-year growth of 11.17% [11]. - The top ten companies in this segment accounted for 90.17% of total sales, with slight improvements compared to the previous month [11]. Group 5: Future Outlook - The decline in multi-cylinder diesel engine sales in February is attributed to the Spring Festival holiday, but expectations for a rebound in March are high as it is traditionally a peak sales season [19].