ja %E5%88%A9%E7%94%A8%E8%80%85:%E3%82%AB%E3%83%81%E3%83%A5%E3%83%BC%E3%82%B7%E3%83%A3%E3%83%BB%E3%83%99%E3%82%BA%E3%82%A4%E3%83%9F%E3%82%A2%E3%83%8B 31st anniversary of the 1989 Tiananmen Square protests