Who knows what "Xia Yuhe by Daming Lake" means?

It means "Wei Zigege's biological mother who met and fell in love with Qianlong by Daming Lake".

I went to the pavilion near Daming Lake to take shelter from the rain and met a beautiful and generous Xia girl. Knowing that it was a fruitless relationship, Xia gave birth to Qianlong, never married, and waited for Qianlong for eighteen years. Acacia died of illness in the end, but she still loved Qianlong at the end of her life and became strange girl whom Qianlong would never forget.

Xia once said: "I have waited all my life, hated all my life, complained all my life, and thought all my life, but I still thank God for having this person who can wait, hate, complain and think, otherwise life is a dry well and there is no life."

Extended data:

Summer yes daughter-Xia Ziwei:

Emperor Qianlong had a dew marriage with a daughter Xia when he visited Daming Lake in Jinan, and gave birth to her. Many years later, Xia died of illness. Wei Zi and Jin Suo, the servant girl, came all the way from Jinan to meet their long-lost father with the keepsake left by Gan Long.

The first one (1998) and the second one (1999) were from Ruby Lin. The third part (2003) is played by Ma Yili; The new version (20 1 1) is played by Lu Hai.

References:

Summer (costume TV series Princess Zhu Huan) _ Baidu Encyclopedia