You can get a gift code from the website. Follow this step
1.go to https://a.4399en.com/gift#
2. Login or register
3..click yong heroes and claim jade sword gift code
4.check your reward on my gift page
How to use gift code yong heroes
Find [Welfare] on the top left corner and choose the [Activation Code], enter the gift code you get
1.Click the button of WELFARE.
2.Find the option of ACTIVATION CODE on the bottom
3.Enter your gift code and then redeem your rewards.