China has strongly advised its carmakers to make sure advanced electric vehicle technology stays in the country, people familiar with the matter said, even as they build factories around the world to escape punitive tariffs on Chinese exports. [time-brightcove not-tgx=”true”] Beijing is encouraging Chinese automakers to export so-called knock-down kits to their foreign plants, the people said, meaning key parts of a vehicle would be produced domestically and then sent for final assembly in their destination market.