GUIDE深度 · Deep dive
Timezones and Border Counts
Timezone count reflects a country's span: Russia has 11, the US has 6 (more with territories); land borders count neighbors, and island countries have 0. Do not guess borders from area.
Timezones
Russia has 11 timezones.
China uses one timezone (UTC+8).
Borders
Island countries: 0 land borders.
Enclaves/territories need separate checks.
For exams, memorize a few extreme cases (Russia, China, island states) and reason the rest from the map instead of memorizing every number.
FAQ
Is timezone count the same as time difference?
No; count measures span, difference compares specific zones.
Why one timezone in China?
Administratively unified as Beijing time, UTC+8.