To Be Number One - Ray Lui (1991) - Hong Kong University Main Building

The police headquarters where Chief Inspector Tiger Lui (Kenneth Tsang) is based is actually the main building at HKU. This is where Ng first sees Lui's mistress and their son and schemes to get on Lui's good side by getting rid of what is obviously a nuisance to Lui. The polished granite(?) staircase leads from the main entrance up to the first floor and thankfully, everything you see in the screencaps appears to be intact. Here's a more recent view of the staircase that you can compare with the bottom image below.