通知 (tōngzhī) vs 通报 (tōngbào) — use 告知 when emphasizing the act of informing rather than the formal notification aspect of 通知 or the reporting nature of 通报.

Imagine a person holding a megaphone (告) to loudly 'inform' (知) a crowd. The megaphone represents the act of informing, while the character for 'to know' (知) signifies the knowledge being shared. Together, they create a vivid image of communication.

Be mindful of the context in which you use 告知, as it may sound too formal in casual conversations. Common collocations include 告知信息 (to inform information) or 告知情况 (to inform about a situation). The first tone in '告' should be pronounced with a rising inflection for clarity.

Although 告知 is not specifically listed in HSK levels, it is relevant for learners around HSK 4, focusing on vocabulary related to communication. Students should practice using it in different sentence structures to enhance their fluency.

In Chinese culture, the act of informing someone—especially regarding important news or changes—is seen as a responsibility and a sign of respect. For instance, in business settings, it is crucial to keep colleagues informed to maintain harmony and cooperation.

Learners often confuse 告知 with 告诉 (gào sù), which means 'to tell.' For example, saying '我告知他这个' (I inform him this) is incorrect; it should be '我告诉他这个.'