Self-assessment
26 questions, about three minutes, no account. The questions and the scoring come from China’s national standard for constitution classification (GB/T 46939-2025), used exactly as the standard writes them.
Instead of hunting for a disease, this describes a constitution — the pattern your body leans toward when nothing is acutely wrong.
And it does not read that pattern on its own. It reads your body against the season, and against the place you live in — body, season and place are read as one system, not as three separate things. Late August in Denver is not late August in Miami. Neither one is the valley in central China this calendar was written for.
Two numbers, one source, one year
About eighteen times more. And life expectancy in the two countries sits within half a year of each other — 78.4 in the United States, 78.0 in China.
Maybe you want to know how people in China look after their own bodies.
Take the test.
One of the nine types is asked about differently for men and women, so the questionnaire needs to know which set to show you.
Your result also shows this fortnight’s climate where you are — how warm, how wet, how much daylight, and how that is shifting — next to the advice for your constitution. US cities of about 100,000 people or more, and cities of 500,000 or more elsewhere — for those we use the US city whose climate is closest, and say so.
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You can switch this off at any time with the link at the bottom of every page. What we record