Lin recalls being captivated by Xuebamao's engaging content on Douban, China's popular book and film rating platform, back in 2018.

林回忆起自己在2018年被雪霸猫在豆瓣上引人入胜的内容所吸引。

So, a " film rating" would be a letter or a number that you would give to a film that would indicate something about it.

因此，“电影评级”将是您给电影的一个字母或数字，以表明电影的某些方面。