Basically, not filing reports (combined with not responding to requests for information) is reason enough to sue them.
Additionnally, they do not respond to queries from the share registrar.
Similar cases exist where either a settlement has been reached with Chinese companies that have gone dark, or where the parent company has been placed under receivership by a US judge, which leaves the not so easy task to recover in China the assets that the parent company legally owns.
I don't know what would happen to the holders of the current ADRs if Zuoan should relist in China. I would however be quite surprised should they have such a plan.
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