微信公众号发送的图文消息里面，点击图片，跳转到外部链接，如何做到？

Question

请教大神：微信公众号发送的图文消息里面，点击图片，跳转到外部链接，如何做到？
例子：公众号“小茶一丛“；这家的图文消息里面有个优惠券，点击优惠券，跳转到外部链接
https://wx2.qq.com/cgi-bin/mmwebwx-bin/webwxcheckurl?requrl=http%3A%2F%2Fmp.weixin.qq.com%2Fs%3F__biz%3DMzA4NTYxNzk1Nw%3D%3D%26mid%3D2653928097%26idx%3D2%26sn%3Dd5aa345f6ea2902b73bcd0c2e04ed23c%26chksm%3D840e26ebb379affda1955666719088608d83f8888b5a0d246efed71386e7cb010c3b04f2b895%26mpshare%3D1%26scene%3D1%26srcid%3D01162vhKX8OltKjVumscC270%23rd&skey=%40crypt_fe66c1db_624033384cee9f1514b2a06af3916adc&deviceid=e686207107642800&pass_ticket=undefined&opcode=2&scene=1&username=@7bfe2f2990902ad01d6a0c60c8e5a805