A design according to Feng Shui principles must integrate the concept of San Cai 三才 - Heaven, Man and Earth 天人地. The part San Cai takes in Feng Shui is Time, Activities and Space. The part San Cai takes in design is Truth, Virtue and Beauty 真善美.
The design must also cater for the special purpose of what the space is for. The concept of yin and yang for a debate is undoubtedly appropriate. The design, however, is too artificial. The Heaven part is represented by a hanging Taiji symbol. This is eye-catching but as Howard Choy pointed out, it is something calling "Look at me, look at me". In Chinese, it is called "the noisy guest overshadows the host 喧賓奪主".
The Man part consists of a structure inspired by the Taiji Tu 太極圖. The male seated in the white section while the female seated at the black section is not the right seating. In the Taiji diagram, there is a white dot in the black part and a black dot in the white part indicating there is yin contained in yang and yang contained in yin. Therefore, the male should be seated in the yin part while the female in the yang part. As a matter of fact, during the show, the man (黃毓民) talked loudly all the time and the woman (葉劉淑儀) had to plead for a chance to speak. It was chaotic and lacked harmony.
The Earth part is also represented by a large taiji symbol painted on the floor where the seats are placed above. Well, the Earth part should be a square conforming to 天圓地方 (round Heaven square Earth). This will help the speakers to talk with solid foundation. Now, what they say are superficial because there is no firm grounds to support them.
The Heaven part must be true 真 meaning that the taiji symbol hanging there should be replaced by light and shadow on the ceiling to be real. The Earth part must be beautiful 美 meaning that the design must be natural symbolizing solid grounds. Although this is a face-to-face heated debate, the atmosphere must be harmonious and the two participants must have constructive ideas for the benefit of the public. The Man part must show harmony and virtue 善.