Pu-erh tea

„Depending on the desired product and speed, from quickest and tightest to slowest and loosest, pressing can be done by a hydraulic press, which forces the tea into a metal form that is occasionally decorated with a motif in sunken-relief. Due to its efficiency, this method is used to make almost all forms of pressed pu'er.“

„Some more obvi­ous man­i­fes­ta­tions of cha qi are a heat­ing or cool­ing of the extrem­i­ties (eg, sweaty palms when drink­ing a ‘warm­ing’ tea like aged puerh or heav­ily roasted oolong), a flush­ing of the face, or a mea­sur­able change in mood. In a small group, tea can either lead to deep con­ver­sa­tion, giddy laugh­ter, or con­tem­pla­tive silence.“