Generally speaking, there are only two situations for an organizational talk from the Organization Department. The first one involves a promotion talk for the purpose of understanding the mindset and confidence levels of the official that's about to be promoted. It can also be regarded as the final appraisal before promotion, aimed at ensuring the promoted official can handle their new responsibilities.
The other scenario is when an official has made a mistake, the Organization Department will hold a reprimanding talk.
In both situations mentioned above, they must be held face-to-face. In reality, what Shi Jiandong did, having this talk over the phone, was already bending the rules a bit. However, given that the parties involved are Nie Zhenbang and himself, nobody would usually make a fuss in such cases. Afterward, when Nie Zhenbang goes to Jingcheng, he can make up for the formality and there wouldn't be any issues.