Core Viewpoint - Sichuan Jinding (600678.SH) announced a change in the amortization method of its subsidiary Huangshan Limestone Mine's mining rights from the straight-line method to the production method starting July 1, 2025, to better reflect operational results [1] Group 1 - The change in amortization method is based on the actual situation of increasing ore production year by year [1] - This adjustment aligns with the principle of matching costs with revenues [1] - The estimated increase in mining rights amortization for the period from July to December 2025 is approximately 21,800 yuan, leading to a corresponding decrease in total profit [1]