What if I fail to complete my permit application and return Malaysia.

Hi. I am Mel. I need to check on the below scenarios. If i have applied a Z visa on 1 December. Then once it was approved, I flew to China. However, during my stay in China. I fail to complete my residence permit due to a need to return Malaysia for an emergency reason. What is the consequences if i do so? Will i be banned from my next visit to China?

And i understand the Z type would only valid for 30 days prior to my application for a residence permit.

Please advice.