According to local newspaper

https://www.hk01.com/%E7%AA%81%E7%99%BC/240231/%E5%B1%B1%E7%AB%B9%E9%A4%98%E6%B3%A2-%E7%AD%86%E6%9E%B6%E5%B1%B1%E9%9B%B7%E9%81%94%E7%AB%99-%E6%B3%A2%E6%B3%A2-%E7%A9%BF%E7%AA%BF%E7%84%A1%E6%9C%89%E6%80%95-%E5%8E%9F%E4%BE%86%E9%97%9C%E4%B8%89%E8%B7%91%E4%BA%8B

The radar ball is scheduled for removal anyway. This is believable info.