Disneyland Resort Line train replacement to create a ‘brand new look’
https://www.railwaygazette.com/metros/disneyland-resort-line-train-replacement-to-create-a-brand-new-look/66311.article
Basically, Disneyland Resort Line usually operates two trainsets. So, for MTR, it's not the significant investment. It means that Disneyland Resort Line can be an appropriate line for testing something.
That would be why battery trains will be installed for the first time among Hong Kong MTR Lines.
