On Aug. 23, 1989, the so-called Baltic Way involved 2 million Latvians, Lithuanians and Estonians protesting Soviet domination of the region.
"I joined the Hong Kong Way because it’s peaceful," protester Peter Cheung, 27, told Reuters, referring to the campaign's name. "This is the 30th anniversary of the Baltic Way. I hope there will be a bigger chance to make an international noise."
Dozens were also shining lights from the top of Kowloon's Lion Rock, visible from the main island of Hong Kong, in an act of defiance after warnings from Communist Party leaders in Beijing and Hong Kong leader Carrie Lam about violence.
The Hong Kong protesters' demands have expanded from the original request in June to scrap the extradition bill, which many feared would give Beijing greater control over the territory by allowing suspects to be handed over to mainland China.
China's Hong Kong affairs office has condemned the mayhem as "near-terrorist acts" — but that hasn't slowed the momentum of protesters.
The human chain — intended to "be a show of solidarity ... and a plea for international support," according to organizers — was the second show of force by protesters Friday. Earlier, hundreds marched in a demonstration led by accountants. Lawyers, teachers and medical workers have previously rallied in support of the protests.
The former British colony became a special administrative region of China in 1997. Unlike those living on the mainland, the territory's 7 million residents can freely surf the internet and participate in public protests.
Paul Goldman reported from Hong Kong, and Linda Givetash from London.
Paul Goldman is a Tel Aviv-based producer and video editor for NBC News.
Linda Givetash is a London-based freelance journalist.