Why is the gate of Harbin Taifu Chang 'an red? Anything to say?

The taxi driver is right. This place used to be a chaotic grave. Therefore, in order to suppress and avoid unclean things when Chang 'an was built, the house was designed to look like an ancient pagoda, and the red door also had a similar effect. These designs have been scrutinized by Feng Shui master, so you need not be afraid. Moreover, this is indeed a superstitious statement. Don't take it completely seriously. If you are really afraid, buy some ornaments to suppress evil spirits.