Hi,

Unfortunately Google reCAPTCHA does not work reliably in China. This is because reCAPTCHA depends on Google services (such as google.com, gstatic.com, etc.), which are blocked or heavily restricted by the Great Firewall.

There is no official configuration or setting in reCAPTCHA, Forge, or ODC that can make Google reCAPTCHA work consistently in China. This is a network-level restriction, not a platform issue. 

If reCaptcha doesn't work, you must use a different tool.

I see TrustCaptcha in ODC Forge. There  was hCaptcha in O11 Forge... Find one that works in China and use it in your project.

Since your implementation targets real users (not just developers), the best practical solution is to integrate a CAPTCHA that doesn’t depend on Google’s infrastructure and serve it conditionally based on user region. This ensures your forms work for users inside China without loading failures or drop-offs.