Question 1

Do I really need a seatbelt in the back seat?

Accepted Answer

Yes. A seatbelt roughly halves your chance of dying in a crash — in light trucks the reduction is about 60%. Of US car-crash deaths in 2022 with known belt status, half weren't wearing one. Cost: free, two extra seconds.

Question 2

Do bike helmets actually save lives?

Accepted Answer

Yes. A helmet with the strap fastened cuts a rider's death risk by about 40% and head injury by about 70% — but the strap must be snug; a loose helmet barely counts as wearing one. Cost: 100–300 yuan and 5 seconds.

Question 3

Are smoke alarms worth the money?

Accepted Answer

Absolutely. A working smoke alarm cuts the chance of dying in a home fire by about 60%, and 40% of fatal fires happen while people sleep — your nose won't wake you. Cost: 30–100 yuan per alarm; replace batteries yearly.

Question 4

How much should I walk each day?

Accepted Answer

About 7,800 steps. People walking that much die about 45% less often than those at 3,500 steps; equivalently, 150–300 minutes of brisk walking a week runs ~30% lower mortality than none. Past a point the benefit plateaus. Cost: free.

Question 5

How many fruits and vegetables should I eat per day?

Accepted Answer

Five servings (about 400 g). Each extra 200 g is linked to ~10% lower death risk; 5 servings runs ~13% lower than 2. More than that adds nothing. Cost: a few to a dozen yuan a day.

Question 6

Are sugary drinks really that bad?

Accepted Answer

Yes. Two-plus bottles a day is linked to ~20% higher mortality than near-abstinence; even 1–2 bottles runs over 10% higher. Diet versions show no benefit either. Water or unsweetened tea is free.

Question 7

Why should I measure my blood pressure?

Accepted Answer

Every 10 mmHg drop cuts major cardiovascular events ~20%, stroke 27%, heart failure 28%, and death 13%. Among Chinese aged 35–75, 44.7% have hypertension but only 7.2% have it controlled. Cost: a 100–200 yuan monitor.

Question 8

How big should my emergency fund be?

Accepted Answer

3–6 months of living expenses, kept instantly withdrawable. Then a job loss or illness won't force you to borrow at 18% annual interest or sell investments at a loss. Cost: free — the tradeoff is lower returns on that cash.

Question 9

Do life jackets really matter for children?

Accepted Answer

Yes. A life jacket roughly halves drowning risk on falling in, and drowning is still the #1 killer of Chinese children aged 1–14. Still, watch children near water constantly — no device replaces attention.

Question 10

Does living near green space help you live longer?

Accepted Answer

It correlates: about 4% lower same-period death probability per 0.1 rise in the vegetation index within 500 m of home — though greener areas also house wealthier people with cleaner air. Treat it as one factor when choosing where to live.

649 High-Value Life Tips