Approximately 90% of young people aged 6–19 are active internet users.

In 2018, average weekly online time reached 27.6 hours (nearly 4 hours/day).

Excessive screen time heavily disrupts sleep rhythms and daily habits.

K12 online education market is expanding rapidly, intensifying academic competition.

Although “burden reduction” policies exist, sleep is still squeezed by homework and extracurriculars.

Primary school students average 8.45 hours — only 40.2% sleep ≥9 hours.

Secondary school students average 6.82 hours — 59.4% sleep less than 7 hours.

Recommended sleep: 10h for children, 9h for teens — the gap is alarming.

Primary: 80% fall asleep before 10 PM, 60% wake up between 6–7 AM.

Secondary: nearly 70% go to bed after 10 PM, 45.7% wake up between 5–6 AM.

The pattern: later to bed, earlier to rise — sleep duration shrinks drastically.

Difficulty falling asleep, mouth breathing, snoring, and using phones in bed are common.

Secondary students show higher rates of “lights-off phone use”, further impairing sleep quality.

Daytime consequences: trouble resuming sleep after waking, fatigue.

Sufficient sleep directly improves learning efficiency and knowledge retention.

Children with adequate sleep are significantly more likely to rank in the top 20% of their class.

Among well-rested primary students, 79.3% achieve top-20% rankings, versus sharp declines in sleep-deprived peers.

Less sleep leads to higher rates of morning drowsiness and difficulty getting up.

Secondary students suffer most: severe fatigue impairs classroom concentration.

Well-rested children report significantly higher energy levels upon waking.

Short sleep duration is strongly correlated with weakened immunity, frequent colds, and inflammation (rhinitis, tonsillitis).

Statistical significance (p<0.05) indicates a close relationship between insufficient sleep and illness.

The problem is more severe among middle/high school students.

Insufficient sleep is associated with emotional instability, anxiety, and negative cognitive patterns.

Sleep-deprived children tend to display higher “dependency” and “lack of self-confidence”.

Conversely, children with adequate sleep show stronger social openness and independent thinking.

Each additional hour of homework reduces sleep by ~0.29h for primary students, and ~0.36h for secondary students.

Correlation analysis shows homework duration as the strongest negative factor.

Critical thresholds: >1h homework for primary, >2h for secondary causes steep sleep decline.

Longer gaming/video time = shorter sleep. Children who refrain from electronic entertainment sleep significantly more.

Blue light suppresses melatonin, prolongs sleep latency, and disrupts circadian rhythms.

Pre-bed smartphone use is especially harmful, notably among adolescents.

For primary students: dinner after 6 PM — each 1h delay reduces sleep by ~0.26h.

For secondary students: dinner after 8 PM — each 1h delay reduces sleep by ~0.23h.

Late eating stresses the digestive system and interferes with sleep onset.

Children’s sleep duration is strongly influenced by parents' own sleep quality.

Parents who refrain from using phones/devices in front of children have kids who sleep longer and better.

Patience during homework help fosters a warm atmosphere, indirectly improving child sleep.

Studying or using screens in bed increases neural excitement and delays sleep.

Positive routines: drinking warm milk, reading light paper books, listening to soft music.

These calming activities improve sleep onset and quality.

75.9% go to bed before 9 PM · 85.9% have dinner before 7 PM.

73.9% homework under 3h · 87.3% game time under 2h (38.6% no gaming).

67.2% of parents report good sleep quality and 68.9% show high patience when helping with homework.

59.6% of parents avoid using phones in front of children.

82.1% fall asleep before 10 PM · 79.5% have dinner before 7 PM.

75.6% homework under 4h · moderate gaming time and stricter screen limits.

Better parental sleep quality (57.6% good) and reduced device use in front of teens.

These students have higher energy levels and better academic performance.

1. Mental load reduction & attitude adjustment.

2. Consistent bedtime routines, screen curfew, and pre-sleep relaxation (reading, milk).

3. Set reasonable homework/entertainment boundaries.

4. Parental self-discipline — be a role model for healthy sleep.

High-quality sleep families invest in suitable bedding, blackout curtains, soundproofing, and optimal room temperature.

Only ~30% are currently open to smart sleep aids, showing cautious adoption; preference for smart bedding and environmental monitors.

Learn efficient study methods and time management.

Avoid screen time for at least 1 hour before bed.

Cultivate a wind-down routine and prioritize sleep as essential for growth.

Reduce your own digital dependence and create a calm, device-free evening zone.

Help children plan regular sleep/wake schedules and a supportive bedroom environment.

Stay patient during homework interactions: emotional warmth improves children’s stress and sleep.

Government: implement burden-reduction policies and prioritize school start times.

Schools: assign reasonable homework, educate on sleep hygiene.

Enterprises: develop evidence-based sleep solutions; media promote sleep awareness.

Sleep health is a mirror of social well-being — multi-stakeholder action required.

From 1995 to 2018, only 392 academic papers focused on youth sleep in China — a profound research gap.

This white paper underscores that insufficient sleep undermines academic success, physical health, and personality growth.

High-quality sleep families prove that change is possible: better habits, parental modeling, and societal support.

The higher the grade, the more severe the sleep deficit. Imitating high-quality sleep families is the most effective solution.

“Children today grow up in a fast-paced digital era, learning to run fast — yet they often forget how to rest well.

Healthy sleep is the greatest wealth for their future.”

—— iResearch Consulting, wishing every child a peaceful, restorative night’s sleep.