The US has warned China that moving a drilling rig into seas disputed with Vietnam was "provocative".
In a telephone call, US Secretary of State John Kerry told Chinese Foreign Minister Wang Yi the US had "strong concerns" over recent developments.
Last week, Chinese and Vietnamese ships clashed over the drilling rig that China has placed in waters near the disputed Paracel Islands.
China and Manila are also at odds over overlapping territorial claims.
Beijing claims a U-shaped swathe of the South China Sea that covers areas other South East Asian nations say are their territory.
The issue has been rumbling in recent years amid an increasingly assertive stance from China over its claims.
Last week, several collisions were reported between Chinese and Vietnamese vessels in disputed waters as the Vietnamese ships sought to prevent the installation of the Chinese drilling rig.
Reports suggest the stand-off - involving dozens of ships - is continuing, with water cannon fire being exchanged.
Called Xisha in Chinese, Hoang Sa in Vietnamese Claimed by China, Taiwan and Vietnam More than 30 islands and reefs, including two main groups: the Amphitrite group and the Crescent group Woody (Yongxing) Island, the largest island in the archipelago, now hosts the City of Sansha with a small community of fishermen, civil servants and soldiers Vietnam maintains 'historical claims' to the Paracels without physical presence there It controlled several islands within the Crescent group, where it had a weather station, until 1974, when after a brief but bloody clash China gained control over the entire archipelago
On Sunday, anti-China protests took place in several Vietnamese cities. It is the most serious confrontation between the two nations for several years.
In Monday's telephone call, Mr Kerry "said China's introduction of an oil rig and numerous government vessels in waters disputed with Vietnam was provocative", US State Department spokeswoman Jen Psaki said.
"He urged both sides to de-escalate tensions, ensure safe conduct by their vessels at sea, and resolve the dispute through peaceful means in accordance with international law."
Separately, in comments made at a meetingwith the Singaporean foreign minister, Mr Kerry called the Chinese move an "aggressive act".
Mr Wang, meanwhile, urged Mr Kerry to be objective on the issue, a Chinese foreign ministry spokeswoman said.
Tensions between Beijing and Manila are also running high, after the Philippines arrested and then charged nine Chinese fishermen with poaching at a disputed shoal.
The Philippines is in the process of taking China to a UN court over its territorial claims.
It has also recently signed a new security deal with the US which would allow an expanded US troop presence, in a move seen as linked to Manila's deteriorating ties with Beijing.
On Tuesday, Chinese state media slammed the Philippines, saying that if it continued to challenge China it would pay "an unaffordable price". John Kerry cũng gọi hành động này của Trung Quốc với Việt Nam là khiêu khích này
A man who died in a bus fire in southwest China is thought to have been responsible for the blaze, Chinese authorities say.
The commuter bus caught fire on Monday night in Yibin city in Sichuan province.
A total of 77 people needed hospital treatment, including 12 who were either seriously injured or in critical condition, Xinhua news agency said.
The suspect, who was the only fatality, was identified as Yu Yuehai, 51.
No information regarding a possible motive was given.
But in recent months there have been several incidents in which individuals fuelled by personal problems or grievances have set public buses on fire.
Earlier this year, a man who suspected his wife of infidelity killed six people in a bus fire in Guiyang.
And in June 2013, more than 40 people were killed in a bus fire in Xiamen in an incident blamed on a suicidal local resident. Dạo này thấy Trung Quốc nhiều vụ kiểu thế này nhỉ
China has deployed armed police patrol vehicles in Beijing after three attacks at transport hubs around the country.
The 150 vehicles are tasked with "countering street terrorism and fighting severe violence", state-run Xinhua news agency said.
Petrol purchases would also be tightened, with buyers required to register with police, reports said.
The move follows station attacks in Kunming, Urumqi and Guangzhou, and comes before the Tiananmen anniversary.
Xinhua said the armed police patrols would be stationed at major road junctions and manned by at least nine police officers and other assistants.
They would cover an area of 3km (1.8 miles) and would be required to respond within three minutes, Xinhua added.
Meanwhile, those buying petrol would have to explain their intentions in a move that aimed to prevent the use of gasoline "to create disturbances", People's Daily newspaper said.
Uighurs are ethnically Turkic Muslims They make up about 45% of the region's population; 40% are Han Chinese China re-established control in 1949 after crushing short-lived state of East Turkestan Since then, there has been large-scale immigration of Han Chinese Uighurs fear erosion of traditional culture
The security upgrade comes amid heightened concern over security after the three station attacks.
March's group knife attack in Kunming left 29 people dead and more than 100 wounded. A similar attack in Urumqi in April left three people dead and almost 80 injured.
Chinese authorities have blamed both attacks on separatists from the Muslim Uighur minority group, which lives in Xinjiang.
It is not yet clear what sparked an attack last week at Guangzhou station in which six people were hurt. One man is reported to be in custody.
In October 2013, meanwhile, five people died and dozens were injured after a car drove into a crowd near Tiananmen Square and burst into flames.
Officials said three of those who died - the occupants of the car - came from the Uighur minority group.
The Uighurs, who are ethnically Turkic Muslims, say that large-scale Han Chinese immigration into Xinjiang has eroded their traditional culture and accuse Beijing of oppressive control.
There are sporadic violent incidents - in 2009, bloody ethnic riots in Urumqi left about 200 people dead.
Chinese authorities, meanwhile, say they have invested heavily in the region to improve people's lives.
The boost in security in Beijing also comes three weeks ahead of the 25th anniversary of the crackdown on anti-government protesters at Tiananmen Square.
Several well-known activists, including journalist Gao Yu, have been detained ahead of the anniversary.
Học Tràng Thi thì Ok rồi. Service tốt. Đặc biệt, ơ đây mình thấy có khu quầy Bar, view đep phục vụ coffee và sinh tố rất ngon.
Người ta nói là nước đun đi đun lại nhiều lần mà bạn.
May 13, 2014 -- Updated 0634 GMT (1434 HKT)
STORY HIGHLIGHTS
150 police vehicles, 1,350 armed officers to be deployed on capital's streets
Officials say deployment is measure to protect citizens against possible terror attacks
Significant stepping up of security comes ahead of 25th anniversary of June 4th crackdown on Tiananmen Square
Defense minister says that southern borders need to be better protected to prevent terrorism
(CNN) -- Beijing police have significantly stepped up security measures in China's capital, in what the country's state media described as "an escalation of anti-terror efforts" following a string of attacks.
Beijing has deployed more than 1,300 armed police officers and 150 patrol vehicles throughout the city at major intersections, according to Xinhua, China's state-run news agency. Each armed vehicle, comprised of nine police members and four assistants, are expected to cover a three-kilometer (1.86 mile) radius and respond to any incident within three minutes.
The presence of these armed vehicles were called a "deterrent to terrorists," according to Xinhua.
Such visible measures come as China reels from several bloody bomb and knife attacks in rail stations over the past few months.
Large anti-China protests in Vietnam
China warns Vietnam over sea dispute
Q&A: South China Sea dispute
Called Xisha in Chinese, Hoang Sa in Vietnamese
Claimed by China, Taiwan and Vietnam
More than 30 islands and reefs, including two main groups: the Amphitrite group and the Crescent group
Woody (Yongxing) Island, the largest island in the archipelago, now hosts the City of Sansha with a small community of fishermen, civil servants and soldiers
Vietnam maintains 'historical claims' to the Paracels without physical presence there
It controlled several islands within the Crescent group, where it had a weather station, until 1974, when after a brief but bloody clash China gained control over the entire archipelago
John Kerry cũng gọi hành động này của Trung Quốc với Việt Nam là khiêu khích này
Bus fire in China's Jilin kills 10
'Suicidal' man caused China bus fire
Dozens dead in China bus fire
Dạo này thấy Trung Quốc nhiều vụ kiểu thế này nhỉ
Thế thì mình cứ thưa kiện trước đi, xem Toà án Quốc tế họ xử thế nào. Chứ chưa kiện mà đã uýnh thì chắc chẳng ai dại mà làm vậy.
Vậy nếu mà kiện nhưng mà Toà họ xử có lợi cho Trung Quốc thì mình làm sao?
Các bác cho em hỏi là nếu nó mà cắm vòi xuống hút thì mình sẽ xử lý tiếp như thế nào ạ?
Ngày xưa, trong một khu rừng rậm có một con Voi rất hung dữ. Gặp bất kỳ loài vật nào, Voi cũng dùng đôi ngà ghê gớm của mình húc chết. Voi chưa chịu thua một loài vật nào. Vì vậy, càng ngày Voi càng kiêu ngạo.
Paracel Islands
Called Xisha in Chinese, Hoang Sa in Vietnamese
Claimed by China, Taiwan and Vietnam
More than 30 islands and reefs, including two main groups: the Amphitrite group and the Crescent group
Woody (Yongxing) Island, the largest island in the archipelago, now hosts the City of Sansha with a small community of fishermen, civil servants and soldiers
Vietnam maintains 'historical claims' to the Paracels without physical presence there
It controlled several islands within the Crescent group, where it had a weather station, until 1974, when after a brief but bloody clash China gained control over the entire archipelago
Continue reading the main storyRelated Stories
Detained Gao Yu on what ails China
Guangzhou attacker 'acted alone'
Will 'ethnic cohesion' mend Xinjiang?
Continue reading the main storyUighurs and Xinjiang
Uighurs are ethnically Turkic Muslims
They make up about 45% of the region's population; 40% are Han Chinese
China re-established control in 1949 after crushing short-lived state of East Turkestan
Since then, there has been large-scale immigration of Han Chinese
Uighurs fear erosion of traditional culture
Q&A: China and the Uighurs
Activists held
http://www.bbc.com/news/world-asia-china-27338113
Em tạm dịch cho các mẹ nghe nhé:
"Hoàng Sa vốn là lãnh thổ của Trung Quốc" Hua Chunying, thay mặt Bộ trưởng Bộ Ngoại Giao Trung Quốc đã nói vắn tắt vào hôm thứ Hai. "Các hoạt động bình thường của các công ty Trung Quốc thuộc/nằm trong chủ quyền của Trung Quốc. Trung Quốc đã yêu cầu bên phía Việt Nam tim giải pháp để bảo vệ sự an toàn và quyền lợi hợp pháp của công dân và các tổ chức của Trung Quốc ở Việt Nam"