Bosco Wong (黃宗澤) suffered from a leg injury due to filming Flying Tiger 2 (飛虎之雷霆極戰) drama earlier. However, he resumed the shooting not long after undergoing an operation in order not to affect the progress. On 10th January 2019, Bosco shared photo of himself sitting on a wheelchair in an uniform online and said: “I am part of Special Duties Unit and can walk despite sitting on a wheelchair.”

Source: https://ol.mingpao.com/php/showbiz3.php?nodeid=1547112500818&subcate=latest&issue=20190110