He is known for his radical and frequent public protests, multiple convictions due to those protests and his iconic long hair.
Leung ran again in the LegCo Election 2004 and succeeded in winning a seat in LegCo with 60,925 votes, an over 200% increase in votes compared to the 18,235 votes he received in the 2000 LegCo election.
Leung's key campaigns include universal suffrage, and working- and under-classes welfare. His political agenda include introduction of a liveable minimum wage and a comprehensive social security system, restoration of workers' right to collective bargaining, and setting a tax on business speculation.
He has been briefly jailed several times for offenses such as shouting from the LegCo's public viewing gallery and burning the Chinese national flag.
Although he expresses his fondness of Che Guevara and the ideals of revolutionary Marxism, Leung has yet to indicate a 'proletariat' revolution agenda on his election platforms, and many of his ideas and proposals would be readily accepted by most mainstream left (social) liberal and social democratic parties. He is usually seen wearing a T-shirt printed with a snapshot of Ernesto Che Guevara on it.
For the swearing-in ceremony of the Hong Kong Legislative Council on October 6, 2004, Leung's fellow members arrived in business attire. Long Hair, in contrast, wore a T-shirt with Tiananmen Square on the front and Che Guevara on the back. When he was called to come forward and take the oath, he raised his left fist, encircled with a black wristband, a memorial to those who died in the 1989 protests.
Leung had planned to alter his oath of office, but a Hong Kong judge said such a step would make it impossible for him to serve. Instead, Leung, highly revered as the hero of democracy, added his own messages to the standard oath. He demanded vindication for those killed in the 1989 Tiananmen Square crackdown. He called for the release of political prisoners and an end to one-party rule on the Mainland.
Leung shouted at the ceremony: "Long live democracy! Long live the people!" He was then sworn in as a council member. Observers watched closely the reaction from the Mainland government, as Leung's statements touched upon a politically sensitive issue that is often considered taboo in official public settings.
In the aftermath of the Article 23 political storm and debate over freedom of expression, many were concerned about possible Mainland reaction to the incident. However, the Mainland government did not respond in any dramatic fashion.
Leung's populist and unorthodox confrontational style contrasts with the usually restrained atmosphere of LegCo. Rita Fan, the LegCo chairperson, seemed more concerned by Leung's attire for LegCo meetings than any of his political opinions. One legislator commented that "Legco has to get used to Leung, and he has to get used to Legco."
On September 29, 2007, Leung Kwok Hung aka "Long Hair", member of the April Fifth Action vowed to support Jose Maria Sison. Leung was in Europe at the Inter-Parliamentary Union assembly in Geneva, Switzerland. He sits in the Hong Kong legislature as member of the Finance and House Committees, and of the Legislative Panels on Constitutional Affairs, Housing, Manpower, Transport, and on Welfare Services.