Police have boarded an HK Express aircraft at Hong Kong airport following a quarrel between two passengers on a flight from Vietnam over a boy kicking the seat in front of him. The argument, between a Portuguese woman and a mainland Chinese man travelling with his three-year-old nephew, was captured on video by another passenger and widely shared on Chinese social media platform RedNote. The video clip shows the woman pointing angrily at a male passenger and a boy behind her seat and hurling...