What feedback is useful
Helpful feedback includes factual mistakes, formula issues, unclear wording, broken links, rendering bugs, and translation problems between English and Chinese pages.
If a calculator output appears inconsistent, include the page URL, the exact input values, and the expected issue so the case can be reproduced.
Corrections policy
If a factual or mathematical issue is confirmed, the affected page should be corrected as soon as practical and the related SEO metadata or FAQ content should be updated when needed.
When a clarification is better than a formula change, the page copy may be revised to make assumptions and limitations more explicit.
Scope of support
The site is intended to support page-level content and calculator quality, not individualized portfolio guidance or trade recommendations.
Users should not submit sensitive account data, brokerage credentials, or personal financial records through any future contact channel associated with the site.
Contact email
For corrections, page issues, or translation feedback, use the public contact email: zb766767@126.com.
When reporting a calculator problem, include the page URL, your input values, and the expected behavior so the issue can be checked quickly.