After Homecoming, Koo appeared in Yim Ho's Red Dust (1990), Stanley Kwan's Full Moon in New York (1990) and Evans Chan's To Live(e) (1992).
Setelah Homecoming, Koo tampil dalam Red Dust (1990) karya Yim Ho, Full Moon in New York (1990) karya Stanley Kwan dan To Live(e) (1992) karya Evans Chan.