...possibly permanently.

We’re sure that’s the explanation and that there’s nothing sinister or nefarious about this:

China's asset management association said that it has failed to contact 12 domestic hedge fund companies after trying to contact them through telephones, e-mails and short message services.

Fear not, though: The Asset Management Association of China is ready, willing and able to put all 12 of them on milk cartons throughout East Asia if that’s what it takes.

The fund association urged the 12 companies, all of them little-known names, to contact it within five working days, or else would classify them as being "missing".

Twelve Chinese hedge fund houses unreachable by phone, text, email – fund association [Reuters]