Four stories of fatherhood across four generations, four directors, one National Day tribute film about legacy and emotion—*My Country, My Parents* was a production coordination challenge of immense complexity. Wu Jing, Zhang Ziyi, Xu Zheng, and Shen Teng each directed their own segment independently, generating massive cross-team, cross-platform file-sharing demands. LI TRUST's large-file transfer service provided a secure channel for cross-team file exchange during the film's post-production. Material sharing between different director teams, audio track exchanges with the music production team, and bulk distribution of the final master to theatrical distributors were all handled through LI TRUST's dedicated system. For a key National Day release, rigid schedule deadlines made transmission reliability critical—LI TRUST delivered a 99.9% transfer success rate with full real-time monitoring, ensuring zero errors throughout the entire distribution workflow.