However, in this film we see the airport in its former incarnation (and location) as a rather more modest development on the shores of the bay in the San Po Kong area. It wasn't until a few years later that the airport was shifted south with the building of the new (more familiar) runway and the whole of the area you see on these screen grabs below became an industrial area filled with factories (trivia: it was in one of the factories in San Po Kong that an industrial dispute led to the outbreak of the leftist riots in 1967).
The east of HK Island in the far background
Looking northeast - perhaps with a seaplane in the background?
The next pictures are a sequence where we see Suyin's plane land, supposedly, in Chung King but actually we are just seeing another angle of Kai Tak with Diamond Hill area in the background.
It looks to me as though it may say HAEC on that hangar rooftop. HAEC was the previous name for HAECO.
Later on in the film, Suyin goes to meet Mark Elliot at the airport when he returns from Singapore we get to see the very distinctive eastern slope of Kowloon Peak in the background (and I guess the hill on the right of the top shot was what became Anderson Road Quarry?).