USCIS has announced to use the Final Action Dates chart for the purpose of filing I-485 in May 2020. Also, your I-485 cannot be approved until your priority date is current under the Final Action Dates chart.

EB-2 China

Final Action Dates: 10/01/2015 (moved forward 1 month compared to April 2020)

Dates for Filing: 08/01/2016 (no movement compared to April 2020)

EB-2 Rest of the World, excluding China/India

Final Action Dates: Current

Dates for Filing: Current

EB-1 China

Final Action Dates: 07/15/2017 (moved forward 37 days compared to April 2020)

Dates for Filing: 10/01/2017 (no movement compared to April 2020)

EB1 Rest of the World, excluding China/India

Final Action Dates: Current

Dates for Filing: Current