The headquarters of CUHK is located in Haizhu District, which generally refers to this campus. Lingnan Impression Garden is located in Panyu District. From Lingnan Impression Garden to CUHK Headquarters, you can take Metro Line 4 to Line 8, and the map display takes about one hour.
Cuhk has an east campus in Panyu (as a local, I just learned about it). You can take the &”;Fan 201&”; bus at Lingnan Impression Garden, and the map shows that it takes about 37 minutes by car.
Personally, it is more appropriate to play separately for two days, because Lingnan Impression Garden can also spend most of the day.