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Spy Charges Ratchet Up Fears for Multinationals in China

Google Inc. sends an e-mail to some employees traveling to China warning that it’s a “restricted country” and online access to some internal systems will be limited, according to a person familiar with company policy.

Kyocera Corp. only makes photovoltaic cells in Japan and is reviewing cybersecurity measures at its solar-panel assembly plant in Tianjin. Infineon Technologies AG, Europe’s second-biggest chipmaker, fends off thousands of attacks from China every day, although most are amateurish, said a person familiar with the situation.