Possible Clues:

• Capital of the Republic of China
• Southeast Asian island metropolis
• Word of advice about a flight on Aer Lingus from Asian city
• Patrick is back around one, taking an Aer Lingus flight for the Asian city
• Chiang's headquarters
• Nationalists' capital
• Capital on the Tanshui River
• City that lost its 'tallest building' distinction in 2007
• Capital on the Tan-shui
• Capital of 2.6 million