'套磁' (tào cí) is a colloquial verb meaning to build informal rapport, establish connections, or 'warm up' a relationship—often before asking for a favor, seeking advice, or pursuing an opportunity. Literally, 套 means 'to fit over' or 'to coax', and 磁 means 'magnet', evoking the idea of creating 'magnetic attraction' between people. Though playful and metaphorical, it’s widely used in professional and academic circles, especially among students and young professionals trying to approach professors, mentors, or potential employers.

The term carries a lighthearted, slightly self-aware tone—it acknowledges that relationship-building involves some intentional effort, but not manipulation. It’s common in contexts like graduate school applications, internship networking, or startup collaborations. While not inherently negative, overuse or insincerity can undermine its effectiveness. It’s typically followed by a noun (e.g., 套磁老师) or used intransitively with context (e.g., 他最近在套磁).