[Joint Filing Agreement [Remainder of this page has been left intentionally blank.] High Vivacity Holdings Limited Arthur Xiaobo Hong Arthur Xiaobo Hong] [*The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page. CUSIP No. G93629106]