Centrist party Third Side is considering fielding three or four candidates in the Legislative Council election in December.
Chairman Tik Chi-yuen and vice chairman Casper Wong Chun-long set up a street booth in Tai Kok Tsui yesterday where Wong spoke of plans for the geographical constituency elections.
Wong said he and Tik will focus on work in Kowloon West and Kowloon Central, and will visit districts more to improve the party's image.
Wong believed more than 10 people from the opposition camp would take part in the election.
He also urged parties, including the Democratic Party, to consider joining the election as he believes there is still room for their voices in the legislature.
He said the Causeway Bay attack on Thursday - in which a 50-year-old man stabbed a 28-year-old policeman before killing himself outside Sogo department store - was a tragedy that reflected the distrust between the public and the government.
The party will focus on livelihood issues such as elderly welfare.
Tik said Third Side is positioned as a "non-pro-establishment party" and aims to safeguard the interests of the middle and lower class and fight for universal suffrage in accordance with the Basic Law.
Meanwhile, individuals and groups whose eligibility is affected by the electoral changes and newly eligible voters had to submit their voter registration by yesterday, so they can vote in the Election Committee subsector election in September and Legco election.
Last year, the city saw a surge of 400,000 newly registered voters, bringing the total to 4.46 million.
Unlike in the past, when many parties and civil groups would push for voter registration, the pro-democracy camp is showing a lukewarm response to the revamped elections this year, as more professional groups have disbanded.
The Progressive Teachers' Alliance announced it had stopped operation on Sunday night.
The alliance, formed in 2014, announced on its Facebook page it will cease operations without citing the reason.
The Progressive Lawyers Group - a civil group formed by local barristers, solicitors and law students in 2015 - has also disbanded.
Barrister Billy Li on-yin of the group confirmed the disbandment, saying the decision was made after a meeting earlier. The group had been outspoken on legal and political issues.
At least six other groups and parties have disbanded in the past 10 days, including Community Sha Tin formed by pro-democracy Sha Tin district councillors, pro-democracy party Neo Democrats and two medics concern groups - the Frontline Doctors' Union and Medecins Inspires.