"Brother Han is talking about the 'Unified Focus Technique'! This technique is indeed extraordinarily magical; it is a secret technique created by the Qing Clan. However, cultivating this technique is exceptionally demanding. Not only is it required that the practitioners be blood-related brothers, but their cultivation techniques and realm levels must also be nearly identical to perform such a technique. The Qing Clan is different from other tribes; most of their members are born as conjoined twins, and it is common to see six or seven born at once. However, when they are slightly older, they can separate on their own. At the four gates of Yun City, there are special Qing Clan members responsible for probing those entering the city. Once this technique is performed, the spiritual senses of several individuals merge into one, granting them insight three or four levels above their realm, which cannot be concealed from them." Jia Tianmu explained with a smile.