Simply take a photo with your partner at one of the 14 designated check-in spots in Chiang Rai, check in at the location, and post the photo on Facebook with public visibility along with the hashtag #โพสต์รักบอกฮักที่เชียงราย (#PostLoveShareAffectionChiangRai). Then, screenshot your post and send it via Facebook Inbox to TAT Chiang Rai Office Facebook Fanpage...