They walked out at 10 am and planned to stay out for 17 minutes, one for each victim of the shooting.
They will board a Dutch plane in the Shuangliu International Airport in Chengdu, Sichuan province at 2:35 pm on Wednesday and arrive at Amsterdam Airport Schiphol at 1:05 am on Thursday.
Thirty-five sets of artworks from professional group and 50 sets of artworks from youth groups are on display after rounds of selection by a judging panel of representatives from fields of design and folklore in China.
They will also deliberate on draft revisions to land administration and urban real estate administration.
They made the announcement as the High Court of the Hong Kong Special Administrative Region on Friday extended an interim injunction that bans protesters from impeding airport operations.
They also watched the presentation of some Sino-Serbian infrastructural projects and were briefed on the progress of these projects.
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Thirty-four species and subspecies of native mammals have become extinct in Australia over the past 200 years, the highest rate of loss for any region in the world.
They are also required to play a positive role in promoting economic development, serving the public, and promoting core socialist values.
Thirteen people had been admitted to hospital after the accident, including three later confirmed dead. A rescue mission is ongoing, said the source.
They live in a three-bedroom house at the institute and are responsible for the day-to-day care of the children until they are either legally adopted or reach their 18th birthday.