A brisk, malty black tea from Yunnan, graded Flowery Orange Pekoe — a leafier, gentler grade than the more common Broken Orange Pekoe blends. That grading is part of why it works so well as a morning cup: the flavour is strong and full without tipping into harshness, built around notes of lemon and orange against honey sweetness, a nutty backbone, and a faint spice and coffee-like depth. Milk suits it as easily as a splash of lemon or a spoon of honey, and it holds up equally well taken black.
The "breakfast tea" style itself has a longer history than the China label suggests. The idea is generally credited to a Scottish tea master, Robert Drysdale, who first blended and named a tea for the purpose. The now-familiar "English Breakfast" name only attached itself later, after Queen Victoria visited Drysdale and the tea took on royal associations. Chinese Breakfast Tea sits in that same tradition, applied to leaf sourced from Yunnan rather than blended from multiple origins.
Expect roughly 45mg of caffeine per 8-oz cup, moderate for a black tea and enough to justify the breakfast billing without overdoing it. Black tea of this kind has long been drunk as a digestif and general pick-me-up, though that's tradition rather than anything to lean on medically.
To brew it, use loose leaf in an infuser or filter, pour water at a full boil over the leaves, and steep for about four minutes — toward the longer end of the usual three-to-five-minute range, which suits the tea's subtler FOP grade and lets the sweetness and spice come through fully before any bitterness sets in.