What you heard should be before 2008. At that time, there was a bug in the entrance examination rules of Macao, which did not force candidates to hold Macao identity cards ... Therefore, some mainland students from HKUST took the entrance examination in Macao and dropped out of HKUST if they were accepted. So that's not a transfer in essence, but a second interview at the university. This bug was blocked in 2008, so no one can go this way since 2008.