BEIJING, April 15 (Xinhua) -- A 20-day themed online quiz, focusing on national security education, has been launched as an important online campaign of China's fifth National Security Education Day.

Falling on April 15, this year's National Security Education Day will be highlighted by a series of online and offline activities which are arranged by the Ministry of Justice and a national office overseeing public legal education work.

The public can join the online quiz via an official WeChat account of the ministry, which releases one national security education-related question every day.

Educational lectures, posters and public-interest advertisements will also be used across the country to raise the awareness of national security and create a better environment for safeguarding national security.