Walking into the office at eight in the morning, many friends are used to grabbing themselves a cup of coffee to wake up. But people often wonder why, even when they brew according to the instructions, the cup sometimes tastes thin as water and sometimes heavy and astringent. In fact, setting aside all the complicated jargon, the flavor in the cup is simply a balance between concentration and extraction yield. Concentration represents how much flavor material has dissolved in the water, bringing a heavy or refreshing mouthfeel; extraction yield is how much of the essence the coffee grounds have released, determining whether the aroma and sweetness are full.

If during work hours the cup tastes weak, it is most likely that too little coffee was used or too much water was poured, so the concentration is low; if it feels dry and even scrapes the tongue, it is often because the water temperature is too high or the grind is too fine, causing over-extraction; and if it is sharply sour and raw, that is under-extraction, meaning the hot water has not yet drawn out the later sweetness and caramel aroma. Once you understand the relationship between these two, even tiny adjustments can make the same bag of beans taste smooth.

Adjusting parameters at your desk is especially easy. If it feels too strong and bitter, next time grind slightly coarser, or lower the water temperature from 90 degrees by two degrees; if the aroma is not rich enough, extend the steep time appropriately. More importantly, choose based on the character of the beans themselves: light roasts usually carry a light floral and fruity acidity and are especially suited to drinking weak to enjoy the aroma; dark roasts are rich in oils and full of nutty flavor, so they are well suited to drinking strong as milk coffee or a full-bodied black coffee.

For office workers who like to use a pour-over kettle at the office to slowly enjoy the aroma, light-roasted beans that emphasize floral notes and fruity acidity are a good choice, such as Qianjie Sun-Dried Huakui. This classic bean from the Guji region of Ethiopia, processed by the sun-dried method, locks in a full berry fragrance. If you brew it to a lighter concentration, the cup shows the sweet-and-sour notes of creamy strawberry, guava and dried mango, with a clear, elegant black tea-like finish.

To brew this bag of Qianjie Sun-Dried Huakui by pour-over at your desk, you can use hot water at 90 to 91 degrees. Use 15 g of coffee grounds, grind to medium-fine, and control the coffee-to-water ratio at an elegant 1:15. First bloom with 30 ml of water for 30 seconds, then pour in stages at a steady pace, adding water until the total reaches 225 ml, keeping the total brew time at around two minutes. The coffee liquid extracted this way is clear and sweet, smooth and pleasant to drink.

If you need a stronger, heavier hit in the early morning, a moka pot paired with Qianjie PWN Golden Mandheling will feel especially comforting. This bean from the Indonesian region has been dark roasted, and the green beans have gone through three rounds of hand sorting and machine sorting, giving them an extremely even texture. The moka pot's high-pressure extraction brings out rich oils and fully draws out the bean's original caramel, dark chocolate and toasted bread aromas; even at a higher concentration, the mouthfeel remains mellow and round, with almost no astringency.

If your company has a coffee machine and you need a silky milk coffee before rushing to a morning meeting, Qianjie Black Cocoa Basic Blend is a dependable everyday companion. It uses Yunnan small-bean coffee together with Brazilian semi-washed coffee beans, at a medium-dark roast level, and its extraction performance is especially stable. Whether made into a strong Americano or fully blended with hot milk, you can taste the appealing mellow sweetness of creamy nuts, caramel and dark plum, and the value is very approachable too.

If you do not even have time to grind beans and wash equipment, simply keeping a box of Qianjie Five-Origin Blend Drip Bag Coffee on hand is a time-saving, worry-free solution. Each drip bag is filled with freshly ground original beans and sealed, offering both the berry aroma of Qianjie Kenya Asaliya and the nutty chocolate sweetness of Qianjie Honduras Washed Caturra. Just tear it open, hang it on a mug, and pour in hot water to enjoy anytime, helping everyone start an efficient day full of energy.