Thousands of protesters marched through the streets here on Sunday in a bid to keep up the pressure on the Hong Kong government to withdraw a controversial extradition bill that has triggered series of mass rallies in recent weeks.The protesters gathered in an enclave near the Tsim Sha Tsui mall, frequently visited by Chinese tourists and connected by a high-speed railway to the mainland, hoping to take their grievances against Beijing directly to its people, The Washington Post reported.The crowd chanted "free Hong Kong" in Mandarin, the official language in China, rather than the Cantonese of Hong Kong, and handed out Hong Kong newspapers and posters advertising the upheaval in the city over the past weeks.Some even used Apple's Airdrop service to share photos and demands with nearby Apple devices."Our idea is to spread messages to travelers and tourists, especially those from the mainland," said Yoanna, a 17-year-old student who declined to give her last name for fear of ...