Sam Rainsy (L, upper), leader of the opposition Cambodia National Rescue Party, and his deputy Kem Sokha (R, upper) appear at a rally near the Freedom Park in Phnom Penh, Cambodia, March 8, 2014. Hundreds of opposition-aligned trade union activists and workers illegally rallied on a street near the capital's Freedom Park on Saturday morning, calling for higher wages and release of 21 detained protesters. [Xinhua]