A grass-roots music video praising the happy marriage of Chinese President Xi Jinping and his wife has gone viral online, a phenomenon which observers see as a demonstration of public admiration for the family values the first couple represent.

The three-minute-long music video consists of 33 photos of Xi and his wife Peng Liyuan attending various events and two cartoon images of them, showing details such as loving eye contact between the two.

The video, entitled "Xi Dada loves Peng Mama," has had more than 45 million hits on Tencent's video website since it was uploaded on November 18.

Song Zhigang, the writer of the song's lyrics, from Zhengzhou, capital of Henan Province, told the Global Times that he was inspired when he saw pictures online showing Xi and Peng's close relationship during their state visit to Australia last week.

"[The song] reflected my true feeling and it is not a publicity stunt. The chemistry between Xi and Peng demonstrated the leader's family love, which I think is the foundation of patriotism," Song said.

Just like his lyrics saying that "men should learn from Xi and women should learn from Peng," Song noted that he hopes the song can promote "positive energy" and support the values of family, gentlemanliness and respect for women in Chinese society.

The marriage between the Chinese president and his wife, a renowned former singer, has been a hot topic among Chinese netizens since Xi took office in 2013.

Photos showing Xi holding Peng's hands and helping her board the Chinese research vessel Xuelong in Tasmania on November 18 triggered heated discussion online, with many Net users praising Xi's gentlemanly manner, saying he set an example for husbands across China.

The public's eagerness to discuss China's first couple might encourage the general public to pay more attention to their family and improve women's social status, a Beijing-based political observer, who requested anonymity, told the Global Times.

Observers have said that the close relationship between China's first couple is in line with Xi's public image as a man of the people.

"The personal life of the first couple in China has not been frequently discussed in the past. The popularity of those pictures and videos online is also a demonstration of a change of the top leader's image," the anonymous observer said.

Moreover, Chinese first couple's close relationship is a sign that Chinese leaders' behaviors are in line with international trends.

"Their fine relationship can also help to build a more positive global image for China," the political observer said.