By 2020, 85 percent of preschool children in China will be enrolled in certified kindergartens, according to the State Council in a move to boost equal access to early childhood education. Private kindergartens will no longer be able to sell shares to the public. Listed companies and private investors will also be barred from investing in private kindergartens. Shares in the New York-listed RYB Education Inc., a private kindergarten chain operator, dropped by nearly 55 percent on Thursday.