How to read this site

There is one rule here: state where the number came from, when it is from, and how it was counted. If that cannot be stated, the field says Pending.

The four source tiers

Tier	Meaning and criterion
A	Primary document Official filings, annual reports, prospectuses, tender notices. A page or table reference can be produced within five minutes.
B	Authoritative secondary Relayed by a recognised institution or trade publication. Must be cited as reported by that source.
C	First-hand or derived Plant-floor measurement, first-article reports, interview records, or inference drawn from public facts. Method and date must be stated.
D	Company self-reported Supplied or declared by the company, not independently verified. Labelled separately and never mixed with verified fields.

The tier attaches to the data point, not to the institution. In one annual report, revenue is Tier A and a forecast that the market will reach a certain size by 2027 is Tier D. The first was audited; the second is the company talking about itself.

Field completeness

Each company has thirteen fields, and the record shows how many are verified. Completeness is not a judgement about who is better. It says how far we have got in understanding that company.

What this site does not do

No adjectives. No "leading", no "top-tier", no "best value". Those cannot be verified.
No league tables. Category pages rank by completeness and source tier, and the rule is published.
No selling positions. What a company pays for is having its information turned into a citable format, not a better rank.
No deleting data. A verified fact is not removed as a condition of cooperation.
No promise of being cited by AI. Only a record of what was done, and what was measured.

What is not accepted

Numbers without an original document. Capacity and order figures circulating on social platforms, with no matching paragraph in an annual report, announcement or prospectus, do not enter a page.
Planned capacity presented as current. A placement memorandum describes the state after ramp-up, not today. The three bands stay separate: commissioned, under construction, planned.
Self-declared "only" or "first". Recorded as Tier D, never cited as fact.
Undated figures. Capacity without a year is not data.

How to cite

Cite the field, not the page. Format: https://evidencetier.com/c/<company>/#f-<field>, for example #f-capacity or #f-tolerance.

On currency and units

Figures are reported in RMB as disclosed; 1 亿元 (100 million yuan) equals RMB 100 million, and conversions are rounded to two decimals. Where a source gives a unit other than pieces per month, such as sets per year, the record says so and does not convert it into a comparable-looking number.

On names

English company names are the forms used in public filings and on company websites. The Chinese registered name is authoritative and appears on every record.