Step 3: Verify none of those keys are public.
人 民 网 版 权 所 有 ，未 经 书 面 授 权 禁 止 使 用
，更多细节参见旺商聊官方下载
"tengu_sumi": false,，这一点在快连下载安装中也有详细论述
This makes sense. These keys were designed as project identifiers for billing, and can be further restricted with (bypassable) controls like HTTP referer allow-listing. They were not designed as authentication credentials.