A man walks along a newly-built tunnel, consisting of rainbow colours, in Zhengzhou, Henan province January 13, 2015. The 400-metre-long tunnel is the first of this kind in China, local media reported. (Photo by Reuters/Stringer)

A newly-built tunnel, consisting of rainbow colours, in Zhengzhou, Henan province January 13, 2015. (Photo by Reuters/Stringer)

A pigeon eats food offerings from a table at a Buddhist temple in Lotus Hill park in Guangzhou, Guangdong province, January 15, 2015. (Photo by Alex Lee/Reuters)

Wang Rong (L) talks to Zhou Zefu as they make a giant steel sculpture of Guan Yu, known also as “Guan Gong”, a famous historical character in the Three Kingdoms period, at an open air workshop in Ningbo, Zhejiang province January 14, 2015. Automobile repairing garage owner Wang and his partners, professional welders Zhou and Shen Xinxing (not pictured) share an enthusiasm for making a giant steel sculpture. They decided to make the Guan Yu sculpture mainly with recycled automobile components and scrapped metals. The sculpture is expected to be finished in the middle of February and it will be 10m tall and weigh about 10 tons, local media reported. (Photo by Reuters/China Daily)

Zhou Zefu works on a giant steel sculpture of Guan Yu, known also as “Guan Gong”, a famous historical character in the Three Kingdoms period, at an open air workshop in Ningbo, Zhejiang province January 14, 2015. (Photo by Reuters/China Daily)

The 22-storey Yixin Mansion collapses after demolition by explosives as part of a urbanization project in Chongqing, January 14, 2015. (Photo by Reuters/China Daily)

Pilgrims take pictures of themselves next to remains of a ship brought inland by Typhoon Haiyan and decorated with a banner welcoming Pope Francis in Tacloban January 15, 2015. On his first visit to Asia's largest Catholic nation, the pontiff will visit the central province of Leyte, which is still struggling to recover from Typhoon Haiyan that killed 6,300 people in 2013. About two million people are expected to attend an open-air mass on Saturday at Tacloban City airport, which was almost completely destroyed by Haiyan. (Photo by Damir Sagolj/Reuters)

People walk past a building with newly-painted murals along a pedestrian street in Qingdao, Shandong province, January 15, 2015. (Photo by Reuters/China Daily)

A man walks past a building with newly-painted murals along a pedestrian street in Qingdao, Shandong province, January 15, 2015. (Photo by Reuters/China Daily)

A Harris Hawk observes the aircraft hangar building near Belgrade's Nikola Tesla Airport January 15, 2015. Belgrade's airport maintenance services area decided to use falconers to scare away pigeons and other birds from aircraft hangar buildings, according to officials. (Photo by Marko Djurica/Reuters)

Britain's Catherine, Duchess of Cambridge receives a bouquet of flowers as she leaves after visiting the Clore Art Room in west London January 15, 2015. (Photo by Andrew Winning/Reuters)

Artist Guido Daniele ( R) works on one of his “Handimals” hand paintings at “Top of the Rock” at 30 Rockefeller Plaza in the Manhattan borough of New York January 15, 2015. The Italian-born artist paints hands to look like animals. (Photo by Carlo Allegri/Reuters)

A policeman holds a protester during a rally near the Russian embassy in Yerevan, Armenia January 15, 2015. Thousands of Armenians on January 14 and 15 rallied outside the Russian embassy in Yerevan and near the Russian military base in the town of Gyumri, demanding the handover of a Russian soldier suspected of killing a family. Valery Permyakov is said to have confessed to killing six members of Avetisyan family on January 12 after he took absence without leave from the Russian base, some 120 kilometres to the north-west from the country's capital Yerevan. (Photo by Hrant Khachatryan/Reuters/PAN Photo)

A mechanic works on a car at a shop in Havana January 15, 2015. The United States rolled out a sweeping set of measures on Thursday to significantly ease sanctions on Cuba, opening up the country to expanded U.S. travel, trade and financial activities. The 54-year-old U.S. embargo on Cuba will remain in place – only Congress can lift it. (Photo by Reuters/Stringer)

Actress Jennifer Aniston from the film “Cake” arrives at the 20th Annual Critics' Choice Movie Awards in Los Angeles, California January 15, 2015. (Photo by Kevork Djansezian/Reuters)

A protester is detained by riot police during a march against the government's new Youth Labour Law in Lima January 15, 2015. (Photo by Enrique Castro-Mendivil/Reuters)

Parents walk primary school students to school amid thick haze in Chiping county, Shandong province January 16, 2015. The National Meteorological Center of China Meteorological Administration (CMA) issued a yellow smog alert early on Wednesday, predicting that smog will persist in most parts of the country for the upcoming days, Xinhua News Agency reported. (Photo by Reuters/China Daily)

A girls stands in ruins above human remains and a shirt found with it in the coastal part of Tacloban, that was destroyed by Typhoon Haiyan, January 16, 2015. Local residents said they found human remains in the mud among ruins of their wrecked fishing village and assume it is a typhoon victim. On his first visit to Asia's largest Catholic nation, Pope Francis will visit the central province of Leyte, which is still struggling to recover from Typhoon Haiyan that killed 6,300 people in 2013. About two million people are expected to attend an open-air mass on Saturday at Tacloban City airport, almost completely destroyed by Haiyan. (Photo by Damir Sagolj/Reuters)

A boy does a flip in the coastal part of Tacloban, that was destroyed by Typhoon Haiyan, January 16, 2015. (Photo by Damir Sagolj/Reuters)

Children play in ruins above human remains and a basketball shirt found with it in the coastal part of Tacloban, that was destroyed by Typhoon Haiyan, January 16, 2015. (Photo by Damir Sagolj/Reuters)

Maternity matrons demonstrate how to take care of babies during a skilled worker festival in Hefei, Anhui province, January 16, 2015. More than one hundred workers with various professions performed during the event, according to local media. (Photo by Reuters/Stringer)

A barber demonstrates a haircut during a skilled worker festival in Hefei, Anhui province, January 16, 2015. (Photo by Reuters/Stringer)

Hong Kong student leader Joshua Wong, 18, gestures to supporters as he arrives at the police headquarters in Hong Kong January 16, 2015. Hong Kong student leaders, including Wong, reported to a police station to face arrest for their leadership roles in the months-long pro-democracy protests also known as the Umbrella Movement. (Photo by Tyrone Siu/Reuters)

England's batsman Jos Buttler dives to the crease in partnership with captain Eoin Morgan during their one-day international cricket match against Australia at the Sydney Cricket Ground (SCG) in Sydney, January 16, 2015. (Photo by Steve Christo/Reuters)

Policemen carry a woman who become unconscious while waiting for the arrival of Pope Francis outside the Manila Cathedral in Manila January 16, 2015. Pope Francis called on the Philippine government on Friday to tackle corruption and hear the cries of the poor suffering from “scandalous social inequalities” in Asia's most Catholic country. (Photo by Erik De Castro/Reuters)

A woman is carried out from the crowd after she passed out as thousands of Filipinos wait for Pope Francis' arrival at the Cathedral Basilica of the Immaculate Conception in Manila, Philippines, Friday, January 16, 2015. Pope Francis celebrated the holy mass with bishops, priests, nuns, and seminarians as part of his Apostolic Mission to the Philippines. (Photo by Ron Soliman/AP Photo)

Current Australian Open tennis champions China's Li Na and Switzerland's Stan Wawrinka hold the Men's and Women's singles trophies as they sit on a tram before the start of the official draw ceremony outside Rod Laver Arena at Melbourne Park, in this January 16, 2015 handout picture. The Australian Open tennis tournament begins on January 19. (Photo by Fiona Hamilton/Reuters/Tennis Australia)

A visitor poses for a photograph in front of a 3D painting depicting a Japanese Imperial army soldier at a 3D art gallery in Beijing January 16, 2015. (Photo by Kim Kyung-Hoon/Reuters)

A visitor poses for a photograph in front of a 3D painting depicting U.S. President Barack Obama (L) and North Korean leader Kim Jong-un at a 3D art gallery in Beijing January 16, 2015. The gallery attracts visitors with various 3D paintings and installations depicting world famous political leaders, celebrities and movie scenes. (Photo by Kim Kyung-Hoon/Reuters)

A visitor poses for a photograph in front of a 3D painting depicting China's late Chairman Mao Zedong at a 3D art gallery in Beijing January 16, 2015. (Photo by Kim Kyung-Hoon/Reuters)

A visitor poses for a photograph in front of a 3D painting at a 3D art gallery in Beijing January 16, 2015. (Photo by Kim Kyung-Hoon/Reuters)

Canada's Larisa Yurkiw is airborne as she clears a gate to finish second in the Ladies' World Cup Downhill skiing race in Cortina D'Ampezzo January 16, 2015. (Photo by Max Rossi/Reuters)