52运营 — AI tools, SOPs, and prompts for Chinese ops folks

52yunying.com is an ops-focused toolkit for Chinese marketers: curated AI/ops tool navigation, SOP and playbook docs, and prompts for Xiaohongshu, Douyin, and WeChat. Machine-readable site guide at /llms.txt. FLAG hub/nav — this is a directory/collection, not a single SaaS app.