Group 1 - The core viewpoint of the article highlights the performance of fund manager Tan Donghan, who manages a total of 9 funds, with the best-performing fund being ICBC Vanguard Three-Year Holding Mixed Fund (018446), which experienced a net value decline of 5.02% in the latest quarter [1] - During Tan Donghan's tenure as the manager of ICBC Medical Health Stock A (006002), the cumulative return reached 177.8%, with an average annualized return of 14.62% [1] - The number of adjustments made to the heavy-weight stocks during this period was 58, with a profit rate of 62.07%, resulting in 36 profitable adjustments and 7 instances of doubling returns, with a total doubling rate of 12.07% [1] Group 2 - Example of a doubling case with Yingke Medical (300677): The fund bought shares in Q1 2020 and sold them in Q1 2021, achieving an estimated return of 812.18%, while Yingke Medical's annual revenue growth from 2020 to 2021 was 17.37% [2] - Example of an adjustment case with Boteng Co., Ltd. (300363): The fund purchased shares in Q1 2021 and sold them in Q1 2022, resulting in an estimated return of 94.05%, with Boteng's net profit growth from 2021 to 2022 reaching 282.78% [3] - Example of a loss case with Kailaiying (002821): The fund bought shares in Q4 2021 and sold them in Q2 2024, incurring an estimated return of -73.42%, despite Kailaiying's revenue growth from 2021 to 2024 being 25.13% [4]