This huge factory is not spared the owner must be a Swiftlet farming enthusiast. The roof of the factory has been converted into a Bh. A work place could be a hobby place too.
He didn't install tweeters at the bottom of the entrance hole which he should have.
Another unique one, either that is the sign for some people to recognize who this Bh belong to (with purposes) or a landmark for birds...ha..ha. On the other hand it represents money...M for money $$$$$
Trademark infringement .McDonald may takes legal action....ha.ha .. It has Fly thru but not Drive thru. They don't serve Burger but for sure they serve Birds Nests Soup.