China is expanding not just by trade connections, population, and infrastructure, but also by its geographical size. They got HonKong instead of making it an independent country, and they are trying to acquire Taiwan, Tibet and some portions of the far east of India. They hold all these positions unofficially now anyways, and are overwhelming the rulers or governments of these territories to take them over officially.

Chinese are menacing and warning every other neighbouring country that they adjust to their interests and keep quiet... taking advantage of their position as being Asia's largest country.
Their current project is to acquire Tibet wholly, and they have already done that by pushing an overwhelming number of troops into every part of Tibet and destroying protests by the Tibetan people.
Being a veto power in the United Nations, China made sure Tibet never got its membership to UN. Because if it does, its like all UN countries have accepted Tibet as a country..and any reaction to threats to a UN member country will be supported by the UN, which would then spoil the Chinese dream.
Also, Chinese pressure forced the 14th Dalai Lama of Tibet to leave China and come to Dharmasala, India on exile. Tibet is self-ruled and its parliament-on-exile is run from India even today. This is the only instance I know where a government of a state is in another country on exile.
All this Chinese have been doing for years.. but recently the Chinese expansion project is very aggressive.
Now, while entire Tibet is protesting the takeover by china, none of the UN veto countries are talking anything about it, for china itself is a veto power.. and all veto power countries use their power to get away with all these nasty jobs, as much as the US is getting away with Afganisthan, Iraq and Iran.
India is the latest now, who is listening to everything Chinese say. Poor India is unable to help Tibetans, India having had such weak-hearted, not-so-bold prime ministers like Atal behari vajpayee, and now Dr. Manmohan sign.
China even condemned the visit by Indian prime minister to an Indian state 'Arunachal pradesh', saying Arunachal pradesh is Chinese territory.
All these territories are considered disputed territories and have a history wherein the Chinese never signed or agreed to any border agreements and Chinese say they have 'Suzerainty' over all these territories...simply meaning that the territories as autonomous territories within China.
Below links have details on the border disputes/resolutions Chinese have/had with their neighbours on the territories
Tibet, Arunachal Pradesh, Hongkong, Taiwan


