The Kaesong industrial zone just north of the North-South Korea border has been a relative hive of activity over the past couple of days, but this doesn't necessarily mean companies that operate there will be restarting production any time soon.

Kaesong has been dormant since early April, after the North abruptly pulled 53,000 North Korean workers from 123 South Korean-owned factories amid rising tensions over a U.S.-South Korean war exercise in March.

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