The Magic Crystal - Andy Lau (1986) - 13 Wiltshire Road, Kowloon Tsai

I can't vouch for the interior or backyard scenes, although I'm fairly confident it is the same place, but the exterior street shots for Andy's house were done at 13 Wiltshire Road in Kowloon Tsai. In this case the plot markers at the front wall were very helpful - NKIL 4106 and 4107 are just about visible between the two doors in the screencaps. Sadly, like many older houses (many dating from the early 1950s) in this estate, this one was redeveloped along with its neighbour (#11) into the aesthetically underwhelming but expensive "Wiltshire Place" - a cluster of 4 townhouses - circa 1998. I've included a couple of images of the backyard, just in case it is indeed the same place. Sadly I don't have a historical image of the property, but Gwulo does have an image of the street from 1967 courtesy of Mike Cussans.

Cynthia is running towards Oxford Road. The wall in the background hasn't changed.

The Magic Crystal - Andy Lau (1986) - Kai Tak Airport

The film features a couple of interesting take off/landing sequences at the old Kai Tak runway. These are used when the movie plot moves back and forth between Hong Kong and Greece.

The Magic Crystal - Andy Lau (1986) - Zung Fu Car Park Building, Hung Hom

After leaving the Police HQ, Andy and Winnie head to the carpark where they are cornered by Karov and his henchmen. This was filmed at the Zung Fu carpark building in Hung Hom. Zung Fu are the established local distribution firm for Mercedes Benz, so if you have a Merc in Hong Kong it will have been bought from and maintained by a Zung Fu distributor.

Anyway, the pair manage to escape by rappelling down the outside of the building. The apartment blocks in the background are part of the Whampoa Estate.

The Magic Crystal - Andy Lau (1986) - Girl Guide Headquarters, Gascoigne Road

Andy goes to find the younger sister of his friend who asked Andy to meet him in Greece. She is at a gymnastics class in town. Part of the exterior of this scene - particularly the part where Andy jumps from the balcony to rescue her from kidnappers - was filmed at the Girl Guides Headquarters in Homantin.

The Magic Crystal - Andy Lau (1986) - Oxford Road, Kowloon Tsai

The location of the school attended by Andy's nephew, Ban Ban, is located at the junction of Oxford Road and Ho Tung Road in Kowloon Tsai. I first tried finding this place according to the plot marker that you can see in the top image. However, it looks as though this plot number (NKIL 4539) was discontinued - most likely the plot was divided up, or joined with another, and assigned a new number. In the end I was guided by the distant image of Lion Rock in the background of image 2. 

The building on the site was/is a real school, although you don't really get to see much of it on film. We can see more of the brown building next door, which is the famous Maryknoll Convent School. I found out a few years ago that Terry McQueen (daughter of Steve McQueen and Neile Adams) attended that school whilst her dad was in Hong Kong filming The Sand Pebbles in 1966.

The Magic Crystal - Andy Lau (1986) - Belleview Drive, Repulse Bay

Our introduction to Andy's abilities comes when he and his buddy, Snooker (Wong Jing, also director) raid a criminal's house to obtain evidence from his voice activated safe. The house used, at least for the exterior - I have no way to confirm the interior - is located at #10 Belleview Road in Repulse Bay. Looking at Streetview, I think the house has been remodelled at some point. It still bears the same general shape but a few bits have been added over the years. The ornate gate for the neighbouring property leads to a famous property that Gwulo has a decent picture of here.

The Magic Crystal - Andy Lau (1986) - Former Marine Police HQ, Tsim Sha Tsui

Next film up is The Magic Crystal. The film stars Andy Lau (as...Andy!) and is about a mystery lump of jade with magical powers that falls into the possession of his nephew. As a result they are pursued around the globe - well, okay, between Greece and Hong Kong - by a powerful Russian gangster, Karov (Richard Norton). We have Cynthia Rothrock, Max Mok, Wong Jing, and Sharla Cheung in supporting roles.

The film opens with a view of the old Marine Police HQ shot from what is now a non-existent location - the former front area that was removed during the building's 'renovation'. It's now a boutique hotel and the area in front, part of the hill the building stands on, is now a void filled with former high-end jewelery stores, but many now empty (because that's what happens when you put all your eggs into the "high-spend mainland tourist" basket, and then they go elsewhere).