值得一提的是，开发者只需推荐他们现有的用户通过Openspace去购买应用，音乐，书籍或者电影就可以免费加入。

What's more, there are no fees and developers join by recommending their current users to purchase apps, music, books or movies from the Openspace Store.

youdao

电影、音乐、书籍等评论性和推荐性文章；

Reviews or introductions about movies , music and books ;

youdao

电影、音乐、书籍等评论性和推荐性文章；

Reviews or introductions about movies , music and books ;

youdao