A 1990s-throwback drama packed with pop culture references is trending among young people, sources say.
Families seek alternative energy sources to combat winter power shortages.
More than a dozen are believed held by authorities in Yunnan province.
Traders prefer South Korean brands that let them text in Korean over similar Chinese models.
The pricey device comes preloaded with reference materials and games.
But the drugs are unavailable to all except the rich, sources say.