sīxiǎng tǐxì

== Mandarin == === Romanization === sīxiǎng tǐxì (Zhuyin ㄙ ㄒㄧㄤˇ ㄊㄧˇ ㄒㄧˋ) Hanyu Pinyin reading of 思想體系 / 思想体系