How did the female protagonist invent the toilet to help the male protagonist lose his memory after falling off the cliff?

He couldn't remember the name of the novel at all…The female protagonist, whose name is five words, got into a car accident because she knew that she was not her parents 'biological child. The male protagonist who traveled through time did not like the female protagonist at first, but later he liked her. Later, the male protagonist seemed to have fallen off a cliff, and even his body could not be found. Later, the female protagonist met a person who was exactly the same as the male protagonist, but the name was different. The things that could not be eaten could be eaten, such as fish and chili. Later, the female protagonist found out that it was the same person because the male protagonist was picked up by a sect after falling off the cliff. That sect is called the Butterfly Sect or something. Anyway, everyone has a butterfly in their title
The female protagonist later went with the male protagonist to find four stones. The green dragon, the white tiger, the black tortoise, and the vermilion bird gathered four stones. After the female protagonist saw the era she was in,
That's all I remember. There are two volumes

Answer 1

She had a Date, a modern romance novel about urban life. Although the male protagonist didn't lose his memory after falling off the cliff, the female protagonist also transmigrated and started her own career, becoming more and more powerful. Moreover, the novel also mentioned that the female protagonist had invented some novel and interesting things, such as innovative products like the toilet. The protagonist's growth in this novel is very infectious and full of positive energy. It's very suitable for readers like you who like to travel through time. I hope you like my recommendation. Muah ~