They have just extended the period for rebookings and cancellations.
https://www.airfrance.fr/FR/en/commo...air-france.htm
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If you have a valid Air France ticket, issued on or before 19 February, 2020, for an Air France flight departing from or arriving in China between 31 January and 31 May, 2020, you can postpone your trip at no extra cost onto a later flight until 30 June, 2020 included.
Save time by changing your booking directly online, in the "Your reservations" section of the website or in the mobile app. You can also contact your travel agent.
You may also choose to postpone your flight to after 30 June, 2020 or cancel your trip. In this case, you will be entitled to a full refund. We invite you to contact your point of sale."