Bao Fan's disappearance has renewed concerns of a potential crackdown on finance and tech figures.
The balloon crashed on an island and Taiwan says there is no cause to "jump to conclusions".
Concerns were raised at the flats in Gaziantep, where 136 people died last week - the BBC has found.
Residents of this close-knit community fear the railroad disaster has changed their lives forever.
Golden Globe winner Welch has been credited with paving the way for action heroines in Hollywood.
A second round of protests in seven days place fresh pressure on leader Xi Jinping.
Family members affected by the shooting in Buffalo, NY, speak before a life sentence is handed down.
The BBC is given rare access to a prisoner of war facility housing hundreds in western Ukraine.
Passengers reportedly screamed as the flight from Hawaii plunged 1,400ft before the plane recovered.
The hospital building, which had 300 people inside, failed a 2012 earthquake resistance test.