Meaning:

The Chinese term literally translated as “WiFi-type personality” describes an unstable trait whereby individuals possess the ability to discern the intentions of others in social situations. These people can sometimes understand others perfectly but at other times struggle to accurately comprehend them. People with a “WiFi-type personality” exhibit a variable capacity to understand and respond to others, encountering challenges when it comes to sustaining high-quality, meaningful communication and establishing deep, stable connections with the outside world. This personality trait is likened to a WiFi signal that fluctuates between strength and weakness, intermittently varying in its reliability.

Example:

A: 你和丽丽同学多年，关系很亲近吧？

Nǐ hé lìli tóngxué duōnián，guānxì hěn qīnjìn ba？

You and Li Li have been classmates for years. One might assume that you two are close friends.

B: 我俩的关系也没那么好，因为她有点儿WiFi型人格。

Wǒliǎ de guānxì yě méi nàme hǎo，yīnwèi tā yǒudiǎnr WiFi xíng réngé。

We are not that close, because she tends to have an unpredictable nature in her interpersonal relationships. Though she can be compassionate and an easygoing at times, there are moments when she appears distant and standoffish.