Both were high school classmates
Both have known each other for 10 years
Both went from friends to lovers
Both made a documentary about their stories which gained widespread attention
Both are Coming of Age Dramas about two people overcoming challenges and coming together

ML and FL married early on
Relationship progression after marriage
Both FLs are a little impulsive sometimes
Both MLs are calm and reasonable
FBF is set in the Countryside
FBF is slow paced, healing, and comforting

Both MLs are Smart, Charismatic, and Witty
Both MLs go from Weak to Strong
Both contain elements of Romance, Political Intrigue, Wuxia, Adventure, Time Travel
In ASITP Hong Siu Long who is from 21st century-Hong Kong travels back into the past during the Warring States Period in China.
In JOL Fan Xian is born in the ancient empire of Southern Qing with memories of the 21st century.
ASITP is Darker than JOL
Overall ASITP is a fun and entertaining drama on par with JOL

Both MLs are Smart, Charismatic, and Witty
Both MLs go from Weak to Strong
Both contain elements of Romance, Political Intrigue, Wuxia, Adventure, Time Travel
In ASITP Hong Siu Long who is from 21st century-Hong Kong travels back into the past during the Warring States Period in China.
In JOL Fan Xian is born in the ancient empire of Southern Qing with memories of the 21st century.
ASITP is Darker than JOL
Overall ASITP is a fun and entertaining drama on par with JOL

Similar Plot
Rebellious Male Lead
Coming of Age
1990s
Teenager Male Lead
Male Chases Female First
Both FL want to go to big city to pursue their dreams MoY Hong Kong and YB Shanghai
Both ML find their own ideals step by step and grow into responsible teenagers

If you liked Blossoms Shanghai then I guarantee that you will like this. This is basically an older version of Blossoms Shanghai with similar quality set in the 1920s Republican era in China, the story tells how triad members Hui Man Keung and Ting Lik struggle to survive in Shanghai (then an international settlement), and their rise to prominence in the triad world later.

Yong Zheng was Kang Xi's 4th son, a hard-working and principled man oftentimes misunderstood as heartless and cruel. His succession to the throne was marred and undermined by controversy propagated by some of his own brothers. The country's treasury was nearly empty at the end of Kang Xi's reign and restoring it was only one of the many challenges Yong Zheng had to face prior to and during his own rule. With political motivations abound, can Yong Zheng come out on top against 8th Prince and his supporters? Or, will internal turmoil threaten the country's stability and direction?

Kang Xi ascended the throne at age 8 after Shun Zhi abdicated to become a monk following the death of his favorite concubine. With the help of Grand Empress Dowager Xiao Zhuang, Kang Xi overcame a fierce power struggle against Ao Bai and eventually took control of the country himself. Later he would defeat rebellious former Ming generals Wu Sangui, Shang Kexi and Geng Jinmao, annex Taiwan, and triumph over Ge Er Dan. During his rule of 61 years, the longest in Chinese history, the country enjoyed unprecedented growth and prosperity.

Kang Xi ascended the throne at age 8 after Shun Zhi abdicated to become a monk following the death of his favorite concubine. With the help of Grand Empress Dowager Xiao Zhuang, Kang Xi overcame a fierce power struggle against Ao Bai and eventually took control of the country himself. Later he would defeat rebellious former Ming generals Wu Sangui, Shang Kexi and Geng Jinmao, annex Taiwan, and triumph over Ge Er Dan. During his rule of 61 years, the longest in Chinese history, the country enjoyed unprecedented growth and prosperity.

Wong Tin is an all-powerful tycoon in town. While he is the one who stirs things up, he is also the only one who can settle them. Bao Man Lung sees Tin as his mentor as well as his friend. He is truthful with and loyal to Tin, yet he is bruised all over in the end! Poon Long Ching worships Tin. His is determined to get rich and famous, by fair means or foul. Nevertheless, he ends up being used by Tin's enemy to fight against Tin.

Three months before the presidential nominating convention, Jang Il Joon, from the New Wave Party, declared his candidacy. On that same day, a woman died in a gas explosion in Sam Chuk. Yoo Min Ki, a documentary producer, heard of his mother's sudden death and headed back home. As he cast his mother's ashes in the sea, he thought of his childhood: his father always blurted out that Min Ki was not his son whenever he was drunk. After the funeral, Min Ki returned to Seoul and Jang Il Joon asked Min Ki to work as a PR agent to record the election campaign process. When Min Ki asked Il Joon why he was chosen, Il Joon confessed that Min Ki was his son. Min Ki soon begins to suspect that his mother's death was not an accident and that Il Joon had actually killed her.

-Morally Ambiguous Male Lead
-Ambitious Male Lead
-Smart Male Lead
-Slight Romance

Three months before the presidential nominating convention, Jang Il Joon, from the New Wave Party, declared his candidacy. On that same day, a woman died in a gas explosion in Sam Chuk. Yoo Min Ki, a documentary producer, heard of his mother's sudden death and headed back home. As he cast his mother's ashes in the sea, he thought of his childhood: his father always blurted out that Min Ki was not his son whenever he was drunk. After the funeral, Min Ki returned to Seoul and Jang Il Joon asked Min Ki to work as a PR agent to record the election campaign process. When Min Ki asked Il Joon why he was chosen, Il Joon confessed that Min Ki was his son. Min Ki soon begins to suspect that his mother's death was not an accident and that Il Joon had actually killed her.

-Morally Ambiguous Male Lead
-Ambitious Male Lead
-Smart Male Lead
-Slight Romance