Hangzhou was a port city in China. While interrogating Howard Bern, Cheng Zhi threatened to place him on The China Queen, a container ship leaving the Port of San Diego for an 18-day journey to Hangzhou, after which he would be sent to a labor camp in Xinjiang, unless he gave up who led the attack on the Chinese Consulate. ("Day 4: 5:00am-6:00am")