How a Japanese Company Cut 80% of the Time Needed to Manually Count Pearls
If your elder brother should attack you, put forth the tide-flowing jewel to drown him. If he expresses grief, put forth the tide-ebbing jewel to let him live. Thus shall you harass him. In Japanese legends, pearls are depicted as tide jewels, having the power to control the water flow.
from Pocket https://countthings.com/case-studies/0001
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