Possible Clues:

• Yangtze port
• Exhibit haircut on sailor's head in Pacific port
• Drug and put on a ship
• Port of departure of those kidnapped in Frank Norris book?
• Press men at one time in China
• City that used to impress
• To kidnap like this one may be suspended high at last, by the sound of it
• Kidnap - Asian city
• Trick is singular knack with most of locks
• Kidnap - Chinese port