Group 1 - The core of the open letter lies in the purpose of writing, which aims to transform national ecological governance goals into collective actions and individual responsibilities, fostering a unified societal effort [1] - The key content of the open letter should combine value guidance and practical instructions, providing actionable guidelines that help enterprises reduce compliance costs and convey a sense of collaboration [1] - The effectiveness of the open letter is enhanced by its writing style, using warm and relatable language to bridge the gap between professionals and the public, making the content more accessible and memorable [1] Group 2 - The timing of writing the open letter is crucial, reflecting governance attitudes and should align with policy release cycles, enterprise development rhythms, and seasonal changes to effectively address concerns [2] - Open letters should be issued at key moments such as the implementation of new regulations or the launch of major initiatives to build consensus and clarify rules [2] - Delivering open letters during critical points in enterprise governance tasks or operational planning can provide precise guidance to meet specific needs [2]