Why is the main face of the Monument to the People's Heroes facing north and the back face south, just the opposite of the traditional stone monument?

According to the tradition in China, the front of the Monument to the People's Heroes is inscribed with eight Chinese characters by Mao Zedong, so it was originally designed in the south. However, during the construction process, some people suggested that people should face the front of the monument when entering the square from the east and west Chang 'an Avenue, while others suggested that the front should face north. Collect the opinions of the masses and report to Zhou Enlai. After careful consideration, Zhou Enlai decided that the north is the front of the monument.