The Security Bureau of the Hong Kong Special Administrative Region Government launched the Outbound Travel Alert (OTA) System in 2009. The system was meant to warn citizens of the risks they face when they travel to any of 85 countries in the system. It is color-coded and begins with amber alert, which advises travellers to monitor the situation in their destination and to exercise caution. Under red alert, travellers are advised to adjust travel plans and avoid non-essential travel.
Finally, under black alert, travellers are advised to avoid all travel to affected countries, which signifies that the threat to their safety is severe at the destination. You may visit the Security Bureau's Outbound Travel Alert website to learn which countries are currently deemed risky by the Security Bureau.