Identifying the doors / window shutter | Gwulo: Old Hong Kong

Identifying the doors / window shutter

Can anyone help with identifying this wooden door. I bought it in Hong Kong before the handover and always wondered about Mr. C. U. Chan (why is there an umlat?) and what he did. I would also like to know what the writing says. I really love it!

Rotated view

 

Forum: 

Interesting purchase. Any chance of rotating it so I don't crick my neck :-)

Also, how big is this thing? Are we talking full size door or is it a door froma  window?

Cheers, Phil

And where did you buy it? Any clues from the seller about what it used to be?

Regards, David