The only possible way to share a slideshow is with the help of YouTube, the only service support for this procedure. Select the images that you want to add to your slideshow, then click on the Create Story button and choose a template. Press the Share button and choose the output quality that will be uploaded to the YouTube website. It's also necessary to log in to your account before uploading.
I couldn't find any other possibility to share a slideshow from Lenovo Photo Master.