Hong Kong director Benny Chan has released the first trailer of his latest film "City under Siege", which features Aaron Kwok, Shu Qi and Zhang Jingchu, Sina.com.cn reports.

The trailer has revealed splendid visual effects and many innovative ideas. The explosion scenes, which usually dominate Benny Chan's films, will take the audience's breath away in this film by blowing up more than 30 different vehicles including cars, trucks and even buses. The budget for explosions has been added up to more than 70 million yuan (US$10 million).

Singer-actor Aaron Kwok acts as a clown who accidentally breathes poison gas and changes into a super-powered mutant. The film involves a series of action plots. However, Kwok refused to use stuntmen. Shu Qi plays a selfish bad girl who takes advantages of Kwok to fulfill her goal but finally falls in love with him.

The film is scheduled for release on August 6.