Historical clue formulations

• The world's third-largest city, behind Tokyo and Delhi — 2023-03-07
• Abduct — 2011-11-24
• China's most populous city — 2002-08-12
• Abduct — 1999-04-20
• Carry away, in a way — 1999-03-13
• Major Chinese seaport — 1997-02-10