Meaning of shuō lái huà cháng:
shuō lái huà cháng
说来话长
Idiom
start explaining and it's a long story (idiom); complicated and not easy to express succinctly
Wǒ xiǎng wèi zuótiān wǎnshàng de shìqíng jiěshì, dàn shuō lái huà cháng.
我想为昨天晚上的事情解释,但说来话长。
I want to explain what happened last night, but it's a long story.