A Hong Kong lawmaker was voted out of China's top political advisory body on Wednesday, after he urged Hong Kong's chief executive Leung Chun-ying to resign following ongoing protests.

James Tien Pei-chun's criticisms of Leung and the Hong Kong government violated the rules of the Chinese People's Political Consultative Conference (CPPCC), according to a statement released after a CPPCC Standing Committee meeting.

Tien, 67, said on Wednesday that he accepted the CPPCC's decision and will resign as the leader of Hong Kong's Liberty Party. Tien openly attacked Leung on Friday for failing to put an end to the protests and said that Leung should resign from his position. "I admit that I forgot I was a CPPCC member when I made the remarks," Tien said on Wednesday. 

According to a decision made in a CPPCC session in March, the top political advisory body officially supports the Hong Kong Chief Executive and his policies.

According to the 29th provision of the CPPCC regulations,  members should be warned or voted out of CPPCC if they violate decisions that have been reached by the CPPCC.

"The CPPCC's decision to expell Tien is very reasonable. Tien supported the previous CPPCC decision, which supported the Leung administration, but his remarks went against that decision," said Zhang Dinghuai, deputy director of the Contemporary Chinese Politics Research Institute at Shenzhen University.

Chan Wing-kee, business tycoon and member of the Standing Committee of the CPPCC, was quoted by the Hong Kong-based newspaper Ming Pao on Wednesday as saying that while constructively criticizing the Hong Kong government is acceptable, it is improper for Tien to ask Leung to resign.

CPPCC members can speak freely but they should submit such criticisms to the CPPCC or to the central government rather than make public remarks, Chan said.

"Tien's paradoxical attitude demonstrates that he is not a mature politician," Zhang said, adding that this was not the first time Tien has made remarks that went against the central government's decisions.

In 2003 Tien also opposed a proposed national security law which led to that forced the-then chief executive Tung Chee-hwa withdraw the proposal.

The CPPCC decision came as the Occupy protesters commemorated the one-month anniversary of the protests on Tuesday. The protestors kicked off the movement on September 28, seeking "real" universal suffrage for the 2017 chief executive election. The protesters have also asked CY Leung to step down. Zhang told the Global Times that the CPPCC decision is not likely to intensify the protests.