The race for Tainan mayor has formally taken shape, with a Blue-White alliance squaring off against the Democratic Progressive Party — a significant challenge to the DPP after 33 years in power.

• Kuomintang legislator Hsieh Lung-chieh has completed his registration to run for Tainan mayor and has pledged not to seek a second term if elected.
• He is campaigning under the banner of full Blue-White cooperation, focusing on collusion between officials and business, procurement scandals and waste problems that he says have arisen from the DPP's long tenure in office.
• DPP candidate Chen Ting-fei has shifted to a policy-driven approach, unveiling a plan for "five major tourism corridors."
• Chen's idea is to link attractions, cities and industries into itineraries, encouraging visitors to stay for several more days and boosting local employment.

Outlook: The campaign will hinge on whether the Blue-White integration can be pulled off, and on whether voters want to replace a DPP administration that has governed for many years.