Believe those nonsense things. If it is so effective, countless people in many countries in Europe, America and Japan will be unlucky, especially Germany. Are the Chinese and others not the same species?
A lot of green roofs and roof gardens are still being done in China. As long as the waterproofing is done well and the roots are prevented from damaging the roof, green roofs have both advantages and disadvantages. At least they can save a lot of air conditioning costs in winter and summer.
In short, not all so-called Feng Shui should be believed.