What could be seen in 1 day, i want to include the ceramics, and is everything open in January?

It is suggested that you visit Lingyin Temple and West Lake for one day trip. If you are interested, you can also rent a bicycle and bike around the lake leisurely. The sites are open in January. As for the ceramics, you may go to Southern Song Dynasty Guan Kiln Museum or find a ceramics shop at Nanshan Road.