Editorial & Review Policy
Every formula traceable, every page verifiable — our full quality pipeline
Last updated: August 2025
Tiered Data Sources
We only use traceable primary sources, applied by authority tier. Content involving national standards, tax rates, medical reference values or physical constants follows the latest official publications, disclosed in each page’s "Source & Updates" section.
| Tier | Source Type | Examples | Usage Rule |
|---|---|---|---|
| T0 | Statutes & official bulletins | Income tax law, labor law, central bank LPR announcements | Sole basis for policy content; labeled with applicable year |
| T1 | National/international standards | GB/T, WHO, health authorities, IRS, IUPAC | Default convention for reference values and constants |
| T2 | Primary academic formulas | Mifflin-St Jeor, CKD-EPI 2021, Black-Scholes papers | Implementations follow the original papers, with year noted |
| T3 | Industry conventions | Bank mortgage conventions, renovation waste rates | Reference only, always labeled as "rule of thumb" |
Four-Step Review Process
Every calculator and guide must complete this pipeline before launch — no exceptions:
- Research: locate the highest-tier source for each formula (T0/T1/T2) — no second-hand reposting; coexisting conventions (e.g. Chinese vs WHO BMI cutoffs) are all included in scope
- Implementation: cover edge cases (zero, negatives, extremes) and unit conventions, with worked calculation steps
- Verification: the review team cross-checks results against an independent reference implementation and spot-checks every official table value
- Publication: review date (lastReviewed) and sources are disclosed; the page enters the re-review queue
Triple Verification
- Formula correctness: cross-verified against at least one independent authoritative source (e.g. mortgage payments checked against both the annuity formula and actual bank conventions)
- Edge cases: zero, negatives, extreme values, leap years and month-end overflows tested individually
- Unit conventions: metric/imperial/Chinese-unit conversion factors exact to official definitions (e.g. 1 troy oz = 31.1035 g)
Real Review Cases (Excerpt)
Concrete examples tell the standard better than abstract promises:
- Retirement age calculator: implements the 2025 delayed-retirement reform with separate algorithms for three worker groups, with per-month delay caps verified
- BMI calculator: Chinese (24/28) and WHO (25/30) cutoffs shown side by side — no single-convention misleading
- Housing fund calculator: contribution bases and loan caps for 12 cities updated per annual bulletins, uniformly labeled "subject to local announcements"
- Year-end bonus tax: separate vs combined taxation compared, with bracket-cliff points at 36k/144k/300k CNY flagged
- Open API: physical-range tolerance on height/weight inputs (175 auto-treated as centimeters) — preventing "successful but wrong" responses from misleading callers
Content Structure Standards
Every calculator page must ship a complete set of content blocks — no bare tools:
- Quick answer: the core conclusion with typical values in one paragraph
- How to use: unambiguous step-by-step instructions
- Key points: real formula takeaways, never filler text
- Principles & formulas: derivation and applicability conditions
- FAQ: at least 4 genuine high-frequency questions
- Reference tables: official standards or authoritative ranges
- Related tools & guides: strongly relevant on-site links
- Source & updates: review date and citations disclosed
Periodic Re-Review Cadence
| Content Type | Frequency | Trigger |
|---|---|---|
| Policy-sensitive (tax, social insurance, rates, retirement) | Quarterly | Interim review within 7 days of a policy release |
| Standard-sensitive (medical references, nutrition) | Semi-annual | When authoritative guidelines update |
| City data (housing fund bases, average wages) | Annual | Around the July annual-announcement season |
| Math formulas & physical constants | Long-lived | Re-checked only on user corrections |
Correction Workflow
User corrections are our highest-priority feedback:
- Intake: submit via QQ / WeChat on the contact page — include page URL, your inputs, expected vs actual result
- Acknowledgement: human reproduction and reply within 48 hours
- Fix: confirmed issues corrected immediately, with the page review date updated
- Root-cause: sibling tools audited for the same class of error; the re-review queue is backtracked when needed
AI Citation Policy
AI search engines and academic citation are welcome. The site provides llms.txt, an OpenAPI spec and complete JSON-LD structured data. Citation format: YiJianSuan. [Tool Name]. URL.
Found an error?
Corrections are our highest-priority feedback — answered within 48 hours.
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