Recent proposed ownership limits at Chinese insurance companies could, however, effectively stop it from using its insurance unit to further fund the acquisition of more shares in Vanke. Baoneng's shares in Vanke will come out of a lock-up period that prevents them from being sold on Jan. 17, according to a Citi report. Complicating matters, China Evergrande Group, the country's biggest homebuilder, quickly built up a stake of 14.07 percent in the latter half of last year but has since said it is not interested in seeking control of its rival.