更新1:
"because commerical rent is expensive, so no one is willing to 收購灣景中心大廈 and rebuild a commercial building anymore. " 第一個point我明，you said many of these commercial building are still vacant, 但第二個point,你話： commercial rent 係expensive，唔係更有理由將現在的住宅大廈收購來變做commercial嗎，這個point我唔係好明
