There has been a 30% rise in visitors to a zoo where a video of a bear led to people asking if it was actually a member of staff in a costume. Around 20,000 people a day have been going to Hangzhou Zoo in eastern China, Chinese media has said, after a video of a sun bear named Angela was published last week. The film, seen by millions, shows the creature standing tall on the edge of its enclosure, holding its paws by its side and seemingly looking at the zoo's visitors. Please use Chrome browser for a more accessible…