A fifth contender has entered the race for Kaohsiung mayor, running on a pitch that politicians should face real penalties when they break campaign promises.

• Hung Fang-lung, 63, an environmental engineering graduate who studied in the US, says he is running mainly to push ideas and get more people paying attention.
• His core message: campaign pledges should come with binding rules and punishment for candidates who fail to deliver.
• He wants the idea tested in Kaohsiung first, then applied to candidates nationwide, to stop the pattern of big promises before the vote and no accountability after.
• He lists seven problems facing Taiwan: government transparency, scams, low pay, flooding and the environment, food safety, falling birth rates, and civil service reform.
• He also argues change can come from outside government, through citizen groups tackling low pay in fields like social work and nursing.

Outlook: With the field now at five, expect more candidates to register and the accountability pitch to be tested against better-funded party campaigns.