Why did the public rental housing in Kunming begin to be reviewed three months after it was submitted?

The materials are incomplete. According to Zhihu's inquiry, Kunming public rental housing was submitted for 3 months, but the audit was not started because the materials were incomplete. Kunming, also known as Spring City, is a prefecture-level city, provincial capital, megacity and central city in central Yunnan, one of the important central cities in western China approved by the State Council, and an important tourist and commercial city in China.