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The site of the flat in the case study is not perfect. The hills could surround the home, at the sides, more, thus providing a better 'armchair effect'. The shapes of hills and features on hills, similar to boulders such as Sha Tin's Amah Rock, frequently form the backdrop for wayside shrines. This rock did not ask, some rustics will tell you, to be eroded into the shape of a woman with a baby on her back, and the wind and the rain did not want to sculpt them, it is something that just happened. Such features display the power of nature and the majesty of the cultural landscape. Like the Australian aboriginals, boulders or other objects in Hong Kong can take the forms of beasts, real or imaginary. This is especially so for the Hakka Chinese. There is some resemblance between aspects of Chinese folklore and its Gaelic counterparts. The latter has its mischievous leprechauns.
But whether it be a Chinese village hovel or a palace, the ideals to aim for are similar. With the basic grammar of an ideal site, with us 'armchair of slopes' and 'ring of sunny hills', the spur on the right is known as the 'Azure (green in Cantonese) Dragon'. That on the left is described as the 'White Tiger'. More of an armchair effect would give the building in our case study better protection against calamities. Like typhoons for instance, which rampage in from the south-east.
In the case of a mountain, which should be tranquil but can also signify 'authority and vigour, it may 'overpower' the natural environment. A 'killer breath' (shaar hei), as mentioned earlier, with harmful currents that travel in straight lines, may develop. There, the chi is violent. In some instances these forces can be deflected by screens, fences, water, fountains, mirrors or lucky charms. An eight-sided Baat Kwa, with Trigrams in the centre, may be used. A small, hand-held 'windmill' can be employed to disperse strong chi. With such remedial measures an unfavourable site may later be classified as favourable.
Nevertheless, because of inauspicious circumstances and the anger of the gods, a slope or cliff consisting of partly decomposed rock may turn to mud during a storm. Thus a hill may not provide the intended security to a building. 'Feels as if the mountain top is always watching you,' is how some villagers explain it. To overcome such 'negative influences', trees can be planted to form a 'curtain' in an effort to 'mask' the ridge (Ajmer, 1968:75). But, during the Japanese Occupation in World War II, such trees were sometimes felled because of a fuel shortage.