you translation: we will make every effort to search for those still trapped on the principle of life first, people first. first 9we have a 72 hour window and we will try our best to rescue those still missing. many of the injured have been taken to nearby hospitals for treatment. but, there is concern that the collapse may have affected the surrounding buildings. rescue teams are now reinforcing them and evacuating people. it is unclear why the structures suddenly caved in, and the building s owner has been detained. building collapses are not uncommon in china due to weak safety and construction standards. the chinese president xijinping has called for the victims to be rescued at all costs, and has asked for an immediate investigation into the disaster. jetinder dhillon, bbc news.