The women returned home last month, and claim they're still having to take antidepressants to cope.
Consular staff, both in London and China, assisted the detainees and their families in the UK, to the best of their abilities.
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Scotland Yard said the male youths will appear in custody at Westminster Magistrates' Court on Saturday.
The family of Oliver Dearlove urged people to "think again" before using their fists, as the man who killed him began a six-year jail term.
London Fire Brigade took Southwark Council to court on four charges in relation to safety breaches at Lakanal House in Camberwell.