Hi Kovoschiz,

(1) "name=" serves mainly to display primary name. I think we can at this stage establish that 舊羅湖鐵路橋 is a primary name which was acknowledged by the authorities.

(2) "old_name=" is for historic name for an element. In this case, however, it was a relocated component of the Lo Wu bridge and it currently demonstrates more as a commemorative historic relic, instead of a change in name. I think "old name" may not be able to fully explain the image here.

(3) Even so, "old_name=" should typically be combined with the current "name=" which presents a visual rendering on a map. This would be more in line with the main goal of a map.

Look forward to hearing from you. Thanks.