Because Beijing or peking has always been the center of Chinese civilization, going back to the times of emperors, etc. There was no way a South Chinese dialect going to become the standard. Cantonese time came and went. Cantonese is closer to the more original forms of Chinese.
Dating Guide for Mainland China Datasheet
TravelerKai's Martial Arts Datasheet
1 John 4:20 - If anyone says, I love God, and hates (detests, abominates) his brother [in Christ], he is a liar; for he who does not love his brother, whom he has seen, cannot love God, Whom he has not seen.