正式的「世界定向日」版本將有25條新題目，并於24/5/2017 星期三 00:00時 開放 23:59時關閉。
You are welcome to attempt the 4 questions of this practice.
Solution maps foe this practice version:
The formal "World Orienteering Day" version will have 25 questions and will be opened at 00:00 hrs. and be closed at 23:59 hours (GMT +8.00) on 24/5/2017 Wednesday.