Hi! The "Anniversary Red Envelope" works like a recharge rebate, where you get a rebate for recharging during the event period. You get 20% recharge rebate as coupons, which you can claim in the "Anniversary Red Envelope" interface.

You also get a 10% additional recharge rebate which is for sending to your group members. These are Red Envelopes which you can send into the Group chat for anyone online to pick up (cannot send directly to players). Keep in mind that the red envelopes are only valid for 2 hours after sending to group chat, so make sure Group members are online before sending.