July 30 (Reuters) - Tesla executives ‌have been ‌told to prepare ​for a separation of its China business ‌ahead ⁠of potential merger with ⁠SpaceX, the Wall Street ​Journal ​reported ​on Thursday, ‌citing a person familiar with the talks. Tesla and SpaceX could ‌not ​be ​immediately ​reached for ‌comment outside regular ​business ​hours. (Reporting by Fabiola Arámburo ​in ‌Mexico City; ​Editing by Christian ​Schmollinger)