Even people who didn't follow them on Weibo could see their posts. This is because sina weibo will default to the user's weibo in the followers list even if the user does not actively follow any other users. If you want to see only the Weibo posts of the people you follow, you can enter their name or ID in the search box and search for their Weibo. This way, they could only see the Weibo accounts of the people they followed. If you want to see all the users 'Weibo posts, you can click on the "+" sign next to the search box and add the user's nickname or ID as a keyword to search. However, there might be some non-followers 'Weibo posts that might have different content from your followers' Weibo posts.