The phrase tong guo comes from Mandarin Chinese, where it means to pass, go through, or be approved. As a sound, it circulates as a short clip rather than as part of a longer song, film scene, or viral video, and its original recording is not widely documented. Its appeal online comes from that brevity and clarity: creators use it as a neutral, clear cue for movement, transition, and approval in edits, language content, and short-form videos. Because the meaning is simple and the delivery is direct, it works across contexts without needing an explanation.