Certain Ordinary Shares of Burning Rock Biotech Limited are subject to a Lock-Up Agreement Ending on 4-MAR-2021. These Ordinary Shares will be under lockup for 91 days starting from 3-DEC-2020 to 4-MAR-2021. Details: The company's directors and executive officers, the selling shareholders have agreed with the underwriters not to sell, transfer or dispose of any American Depositary Shares, ordinary shares or similar securities for a period of 90 days after the date of this prospectus.