Exhibit 99.1

JOINT FILING AGREEMENT

This will confirm the agreement by and among the undersigned that the Schedule 13D filed with the Securities and Exchange Commission on or about the date hereof with respect to the beneficial ownership by the undersigned of the Ordinary shares, par value $0.00002 of Genetron Holdings Limited, is being filed and all amendments thereto will be filed, on behalf of each of the persons and entities named below in accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended. This Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument.

VIVO CAPITAL FUND IX, L.P.

By: Vivo Capital IX, LLC

/s/ Hongbo Lu
Name:	Hongbo Lu
Title:	Managing Member

VIVO CAPITAL IX, LLC

/s/ Hongbo Lu
Name:	Hongbo Lu
Title:	Managing Member

VIVO OPPORTUNITY FUND HOLDINGS, L.P,

By: Vivo Opportunity, LLC

/s/ Hongbo Lu
Name:	Hongbo Lu
Title:	Managing Member

VIVO OPPORTUNITY, LLC

/s/ Hongbo Lu
Name:	Hongbo Lu
Title:	Managing Member

VIVO ASIA OPPORTUNITY FUND HOLDINGS, L.P.

By: Vivo Asia Opportunity, LLC

/s/ Hongbo Lu
Name:	Hongbo Lu
Title:	Managing Member

VIVO ASIA OPPORTUNITY, LLC

/s/ Hongbo Lu
Name:	Hongbo Lu
Title:	Managing Member