I have a question about "Remembering the Shocking Shadow": when did Nan Cheng Yao know that Murong Qing was Ning Yu Qing? Did he genuinely like Qing'er before he knew?

Knowing. He knew when Murong Qing fell off the cliff for the second time, and it was stated later in the extras.

The book version of the ending, Murong converge did not marry the princess of Qi Yue, but instead fought the enemy side by side with Qin Zhao, Nan Chengyao later on the imperial army, suffered serious injuries, Murong Qing in order to save Nan Chengyao, agreed to the request of Li Mo (not allowed to go to the capital in his life). In the end, Nan Chengyao gave way to the Crown Prince (Murong Rui's son), and met Murong Qing, who was leaving, at the farmhouse himself.

The web version of the ending, tells the love story of Murong Rui and Princess Tian Lian, they go all the way to take down the Southern Dynasty, Nan Chengyao does not resist at all, and ends up waiting for Murong Rui at the palace, asking him where Murong Qing is. Murong Convergence lied to him that Murong Qing was dead, and in desperation he drank the poison, which was actually the fragrance of the other side of the river (after 3 days of faking his death, he would be back to normal).

Nan Chengyao presumably found Murong Rui's daughter, took her with him, and eventually met Murong Qing at an inn.

Expanded:

Just Remembering the Shocking Shadow is a 2010 book published by Jilin Publishing Group, LLC, and written by Wind Nimbus and Snow Dance. The book is about the emotional story about Nan Chengyao, Murong Qing and others.

Synopsis:

Just Remember the Shocking Shadow is a romance novel written by Feng Ning Xue Dance. Main characters -- Nan Chengyao, Murong Qing (Ning Yuqing). Her sister's unexpected escape from marriage leaves her with no choice but to marry into the Heavenly Family. From being alone on her wedding night, to knowing her husband's engraved once upon a time, she has always taken it lightly. Marrying a prince was destined to have nothing to do with love. All she cared about was to protect her family's peace of mind.

She accompanied him, step by step, to ask the world. She looked at him, the more she smiled the colder her eyes became. Never imagined that there would be a day when everything she believed in, by his own hand, destroyed to pieces-.

Spring wave green under the sad bridge, once a shocking shadow to shine.

Sister's unexpected escape from marriage left her with no choice but to marry into the heavenly family.

From being alone in her room on her wedding night, to knowing her husband's once-bitter past, she has always taken it lightly.

Marrying a prince was not meant to have anything to do with love. What she is interested in is to protect her family's peace of mind.

She accompanied him, step by step, and asked the world.

She looked at him, the more she smiled, the colder her eyes became.

Never imagining that there would be a day when everything she believed in would be, by his own hand, destroyed to pieces.

Keywords for protagonist - Nan Chengyao, Murong Qing (Ning Yuqing).

References:

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Baidu Encyclopedia - Still Remembering the Shocking Shadow