What standards cover
China’s tea standards split into mandatory safety limits and recommended product standards, and white tea sits in the second group.
Mandatory standards carry the GB prefix and cover things that no product is allowed to exceed.
Product standards carry GB/T, which signals a recommended standard, and the white tea one falls here.
It defines what counts as white tea, and it separates the main types by their bud and leaf content.
Silver Needle, White Peony and Shou Mei are treated as distinct products with distinct requirements.
Then come the measurable figures: moisture, ash, water extract and the share of broken leaf allowed.
Contaminants and pesticide residues are not in this document at all, since GB 2762 and GB 2763 handle them.
Labelling has its own rules too, so the claim a package makes is regulated separately from the tea.
The standard number a producer worked to is often printed on the package, and it is worth reading.
That number is searchable in the public national standards library, which anyone can use for free.
What they do not cover
What no standard will tell you is whether the tea tastes good, because standards are written for compliance.
The sensory section sets a floor with words rather than a score, and a person checks it rather than a machine.
Age is the largest gap in white tea, which is unfortunate given how much of it is sold as aged.
There is no standard rule for how long a cake must be stored before it may be called aged.
Origin is similarly outside the product standard, except where a separate geographical indication exists.
Terms like first flush, wild and old tree are market language, and none of them appear in the standard.
Brewing instructions on a package are the seller’s advice, not something a standard requires or checks.
Storage conditions after the tea leaves the factory are entirely outside what any standard can reach.
Two cakes can meet the same standard and be completely different teas, which is the honest summary.
Use compliance to rule things out, and use your own palate to decide what is worth buying.
Grades in practice
White tea grades follow the type first, so Silver Needle, White Peony and Shou Mei each have their own set.
Within a type, grades run from a special grade downwards, and the differences are described mostly in appearance.
More bud and less stem usually means a higher grade, along with a more even colour across the sample.
The chemistry moves very little between grades, since the figures are minimums rather than goals.
Grade is given within a lot, so it ranks a batch against itself and says nothing across producers.
The producer usually assigns it, and few buyers are in any position to argue with the result.
Aged white tea is where grade matters least, because storage has reshaped the tea long before then.
Loose cake and loose leaf sold without a grade are common, and the absence means nothing in itself.
Higher grade buys tidier material and a cleaner aroma, and it does not guarantee a thicker liquor.
Read the grade, then ignore it while you taste, and only afterwards decide what you think.
Safety versus quality
The safety system and the quality system are separate, and white tea makes the distinction easy to see.
Safety is mandatory, with contaminants set in GB 2762 and pesticide residues set in GB 2763.
Quality, including grade, lives in the recommended GB/T standard, and compliance there is voluntary.
So a safe white tea can be thin and flat, and a good one may carry no standard number whatsoever.
Moisture is the figure to take most seriously, because white tea is dried low and damp ruins it.
Water extract gives a rough sense of how much the leaf will actually give up in the cup.
Label rules require a named producer, and a package without one leaves you with nobody to ask.
Home pesticide kits are not reliable enough to settle anything, so do not buy one expecting answers.
Ask the seller for a test report for the batch, which is a reasonable request and usually granted.
Safety is a floor you check once through the seller, and quality is a question you answer by tasting.