How to express condolences to leaders who have returned from overseas aid in fighting the epidemic?

Thank them and encourage them.

The details are as follows. We thank them for their contribution to epidemic prevention and control. We urge them to protect themselves and arrange rest appropriately. We hope they will recharge their batteries, adjust their bodies and minds, and continue to carry forward their fine style of heroic fighting. , and devote ourselves to the next stage of epidemic prevention and control work with a high spirited attitude.