Ms. Voskresenskaya, a former dairy worker, met her husband, Alexei Zaitsev, while they worked on a farm, according to welfare officials in the region and Mr. Akimkin, the family friend and attorney.

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As rising wealth collides with a string of scandals over tainted food in China, prospective acquirers could also shop for premium processed foods abroad, including olive oil and meat and dairy products, such as cheese and yogurt, Ms. Pan said.

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Mr Edwards has questioned Ms Gwyther in the Assembly chamber on what plans she had to discuss the future of the dairy industry in Wales, following publication of the MMC report.

BBC: News | Wales | NFU query MMC report on raw milk