To the challenges facing KFC and Apple in China, add a surprise backlash from Beijing's spat with the Philippines over the South China Sea.
Nationalists are protesting at KFC outlets and calling for a boycott, spurred by government accusations that Washington encouraged Manila to oppose Beijing's claims to vast tracts of ocean.
Photos circulated online show young Chinese wearing scarves with patriotic slogans smashing Apple iPhones in protest.
State media have fanned public anger with a torrent of criticism of last week's ruling by a U.N. tribunal, which found no legal basis for Beijing's claim to most of the South China Sea.
"The Chinese public, as...