BackgroundOn 22 June 2015, few days after the legislative vote on the 2015 Hong Kong electoral reform over the electoral method of the 2017 Hong Kong Chief Executive election, 2017 Chief Executive election, moderate democrat Ronny Tong Ka-wah, who had campaigned for his mid-way reform proposal, announced that he would quit the Civic party that he co-founded and would also resign from the Legislative Council as he said it was inappropriate for him to retain his seat in the legislature because he stood for election as a Civic Party member which was effective on 1 October 2015. After the resignation of Ronny Tong, the seats commanded by the pan-democrats and in the geographical constituencies became 17-17. If the pro-Beijing camp had gained the majority of the seats, the pan-democrats feared that they would have modified the rules of procedure, which require a majority in both geographical and functional constituency (Hong Kong), functional constituencies, in order to block filibustering, which had been used by pan-democrats as a tool against legislative Bill (law), bills by the Leung Chun-ying administration that they saw as unreasonable.
Candidatesof the , the number two candidate after Ronny Tong in the Civic Party’s list running in New Territories East constituency in the 2012 Hong Kong legislative election, last LegCo election in 2012, was named by Tong as his successor. Other pan-democratic parties also made way for the Civic Party in order to have only one candidate to represent the Pro-democracy camp in Hong Kong, pan-democracy camp. Youngspiration, a Localism in Hong Kong, localist group intended to field a candidate and invited the Civic Party to hold a primary, modeling from the pan-democratic primary for the 2007 Hong Kong Island by-election, but later dropped out due to the lack of time for a primary. Yeung submitted his nomination form on 5 January 2016, the first day for the nominations. Holden Chow Ho-ding, vice chairman of the largest pro-Beijing camp, Beijing-loyalist party Democratic Alliance for the Betterment and Progress of Hong Kong (DAB) who submitted his nomination form on 5 January 2016, represents the in the by-election. He was endorsed by major pro-Beijing parties, New People's Party (Hong Kong), New People's Party, Business and Professionals Alliance for Hong Kong and Hong Kong Federation of Trade Unions. Christine Fong Kwok-shan, former member of the Liberal Party (Hong Kong), Liberal Party, independent Sai Kung District Councillor who aimed to provide a choice between pro-democracy and pro-Beijing camp, submitted her nomination form on 7 January 2016. Wong Sing-chi, former member of the Democratic Party (Hong Kong), Democratic Party, announced his candidacy for the newly-formed centrist party, Third Side, aiming to offer an alternative to the now-polarised pan-democratic and pro-Beijing camps. He submitted his nomination form on 11 January 2016. Lau Chi-shing, a nonpartisan candidate submitted his nomination form on 13 January 2016. Edward Leung Tin-kei, a member of localist Hong Kong Indigenous, submitted his nomination form on 15 January 2016. He was supported by the localist groups such as Youngspiration and Civic Passion, as well as figures like legislator Wong Yuk-man and scholar Chin Wan. Albert Leung Sze-ho, an independent candidate submitted his nomination form on 16 January 2016, vowed to modify the rules of procedure in order to block pan-democrats' filibustering.
Mong Kok civil unrestEdward Leung Tin-kei was involved in the 2016 Mong Kok civil unrest, Mong Kok civil unrest broke out on 8 January in which the Hong Kong Indigenous called for actions online to defend the unlicensed hawkers in Hong Kong, street hawkers from being cracked down by Food and Environmental Hygiene Department inspectors and escalated into violent clashes between the police and the protesters. The group also announced that it would “exercise” Leung’s “power” as an election candidate to hold an election march in the Mong Kok night market. Leung was later arrested at the scene and was subsequently released on bail. Other candidates disagreed with the violent acts while Wong Sing-chi of the Third Side asked for an explanation from the Indigenous. Political scientist Ivan Choy Chi-keung believed that the unrest would attract conservative voters come out to vote for the pro-Beijing candidate Holden Chow Ho-ding of the Democratic Alliance for the Betterment and Progress of Hong Kong and further consolidate the radical Localism in Hong Kong, localist base of Leung, which would place the Pro-democracy camp in Hong Kong, pan-democracy 's at a disadvantage.
Electoral forumsA live broadcast electoral forum conducted in English was held during the broadcasting time of ''Backchat'' on RTHK Radio 3 on 17 February. A pre-recorded electoral panel discussion conducted in English was held by ''The Pulse'' on RTHK was first broadcast on ATV World on 19 February.
See also* 2015 Hong Kong electoral reform * 2016 Hong Kong legislative election * List of Hong Kong by-elections