Oh dear, oh dear. The newspapers are full of the terrible problem of tainted powdered milk in China which has left thousands of babies in China in hospital. Now it is being rumoured that a slightly similar problem may be about to hit some wine produced in China.
Chinese authorities (specifically the General Administration of Quality Supervision, Inspection & Quarantine of PRC, or 'ASQSIQ') have, according to this article, detected sodium nitrite in several branded wines made in China. This website also defined this chemical "carcinogenic".
Not good news in any light whatsoever, although Shanghai-based wine writer Sophie Liu...