blog-src/_includes/read-time.html

{% assign readtime = content | strip_html | number_of_words | divided_by:site.words_per_minute %}
{% if page.category == 'en' %}
Reading time: ~{% if readtime <= 1 %}1 minute{% else %}{{ readtime }} minutes{% endif %}
{% else %}
预计阅读时间：{% if readtime <= 1 %}1 分钟{% else %}{{ readtime }} 分钟{% endif %}
{% endif %}