Promotor hand seal

Long Chen's hands were resting on his knees, his thumb touched his third finger's second joint, a so-called promotor hand seal. It was used for calculations and extrapolation. It made a person's mind clearer and more flexible. It was a meditative seal for comprehension.
"Is he trying to calculate where Xiang Yunfei's spatial nodes are? That's impossible," said another Grand Elder.
If he could calculate where Xiang Yunfei's spatial nodes were, he could break this paragon art. But that was impossible.
Let alone Long Chen, even these Grand Elders that had been alive for countless years wouldn't be able to calculate where the spatial nodes were in a short time.
It would take them at least several days. By that time, it would be too late.
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