19 January 2020
On 19 January, the engines for the fourth flight of the Long March 5 complete final testing and are prepared for final assembly.
Unconfirmed reports in (Chinese language) by a Hebei-based "military" blogger on Weibo gives a launch date for the 23 July with arrival on Mars in February 2021 and landing in April 2021. It is not clear, how reliable this information is.
Link to the official news on ECNS
In case of interest for the Weibo report, please check out (at your own risk) here