Photo provided by China National Space Administration on Jan. 3, 2019 shows Yutu-2, China's lunar rover, leaving a trace after touching the surface of the far side of the moon. The Yutu-2, or Jade Rabbit-2, left the first ever "footprint" from a human spacecraft on the far side of the moon late at night on Thursday, after it smoothly separated from the lander. (Photo: Xinhua)

Illuminated swans during China Light Festival at Cologne Zoo in Cologne, Germany, on Jan. 3, 2019. The festival being held from December 8, 2018 to Jan. 20, 2019, displays 50 illuminated items. (Photo: Xinhua)

Switzerland's Killian Peier soars through the air during a trial jump at the third stage of the 67th four hills ski jumping tournament in Innsbruck, Austria, Jan. 3, 2019. (Photo: AP)

Performers with Chinese dragons during the New Year parade in London. Over half a million spectators lined up the 2.2 miles route from Piccadilly Circus to Parliament Square as more than 8,000 performers from 26 countries participated in the 33rd London New Year's Day Parade. (Photo: VCG)

Statue of Christ the Redeemer above Rio De Janeiro as fireworks light up the sky on new year day ushering in 2019. (Photo: VCG)

A handler prepares camels to race during the Liwa 2019 Moreeb Dune Festival in the Liwa desert, some 250 kilometres west of the Gulf Emirate of Abu Dhabi on January 1, 2019. The festival, which attracts participants from around the Gulf region, is aimed at promoting the country's folklore. (Photo: VCG)

A zoo keeper poses with penguins during the annual stock take at the ZSL London Zoo in central London on January 3, 2019. (Photo: AP)

Several stylish new stations have been put into service on Beijing Subway Lines 6 and 8. The stations have been designed on the four seasons while Tianqiao Station on Line 8 reflects the history of Beijing due to its location in the Chinese capital's former old town area. (Photo: VCG)

A boat plies on the Songhua River in Jilin Province amid frosty weather in northeast China’s Jilin Province on December 31, 2018. Popularly known as “snow willow”, the scenery of ice attached to tree branches has turned this quiet village into a splendid winter fairyland. (Photo: VCG)