Six links and four breakthroughs
Liu Tong Si PI, Chinese idiom, Pinyin is Li ù t ō ngs ì P ì, which means up and down four directions and spring and autumn four seasons. From Chuang Tzu, the way of heaven.
The origin of Idioms
Chuang Tzu's Tao of heaven: "those who are enlightened by heaven, enlightened by sages, and enlightened by the virtue of emperors, are self-conscious, ignorant and tranquil."
Idiom usage
Used as a predicate or attributive; used in writing
Examples
The size is fine and rough, and there are six connections. Preface to Confucius reform by Kang Youwei
Six links and four breakthroughs
obtain gold by washing it from sand and gravel - pī shā jiǎn jīn
Advocating emotion and thinking - chàng qíng yě sī
a loss may turn out to be a gain - běi sǒu shī mǎ