1. When the sun is weak and the exposure time is short: First, cleanse your skin; use toner; if you have dry skin, apply a little moisturizer; then apply sunscreen with SPF 15 or higher.
2. When the sun is strong and the exposure time is long, in addition to the above steps, apply sunscreen with SPF 15 or higher, and reapply a two-way sunscreen powder every two hours.
3. When applying sunscreen, don't forget your neck, chin, and ears to avoid uneven skin tone.
4. If sweat washes off the sunscreen, reapply every few hours.
5. Even with proper sun protection, if the sun is very strong, it's best to use after-sun care products at night.
