Chief Executive C.Y. Leung, who has branded the protests illegal, has rejected calls for more talks on political reform and warned protesters not to turn to violence when the clearance starts.
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Splinter protest groups calling for democracy for Hong Kong are springing up and fast-tracking action plans as student-led demonstrators consider a retreat from the main protest site which has blocked key downtown arteries since the end of September.
At their peak, the rallies drew more than 100,000, but their number has dwindled and now there only dozens left.
On Tuesday, the site remained quiet filled mainly with visitors taking photographs.
By 6 p.m. on Monday many supply tents in the area covered by the court order had either been dismantled or relocated to nearby locations.
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Mani Chan was among the last group to move to a new site 10 meters away, still on the roadway but outside the injunction zone. "This station and the volunteers (here) are forming a defense line," Chan said. "We're going to stay anyway."
Clashes between protesters and police increased at the end of November after the clearance of protest sites in the densely populated working-class district of Mong Kok district, on the Kowloon side of Hong Kong harbor.
One man was jailed for six months on Monday for threatening to burn Mong Kok demonstrators with paint thinner, media said on Monday.
Students vow non-violence
Hong Kong, a former British colony, returned to China in 1997. Under a "one country, two systems" formula, the city has some autonomy from the Communist Party-ruled mainland and a promise of eventual universal suffrage.
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Beijing has allowed a vote in the next election in 2017, but insists on screening any candidates first.
Student groups have been considering a retreat from the main campsite for over a week with key leader Joshua Wong saying his group would maintain the principle of non-violence during the clearance of the Admiralty site.
Volunteers are currently considering how to pack up the huge amount of supplies from tents and toiletries to saline solution and cereal.
Cheung, a middle aged volunteer who would only give his surname, said in the coming days the supplies from his station might be transferred to a warehouse and stored for future campaigns and some would be given to the Hong Kong Federation of Students.
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Kenny Ho, a 20-year-old student who sat in a tent next to the injunction area, vowed to stay put until police cleared the site. "I worry about my future after the movement, but I believe that I will have a future if Hong Kong has a future."