| Alt Name: | The Prince Who Lost His Castle |
| Genre: | Romance comedy |
| Director: | Chen Zhi Han Feng |
| Starring: | Victoria Song Calvin Chen Zhou Mi |
| Opentheme: | When Love Walked In by By2 |
| Endtheme: | Pass By by Jeanie Zhang |
| Country: | China Taiwan |
| Language: | Mandarin |
| Num Episodes: | 32 |
| Producer: | Meng Xue |
| Location: | Shanghai, Hainan, Taipei |
| Company: | Shanghai Film Co. |
| Channel: | GTV |
When Love Walked In is a 2012 Chinese-Taiwanese co-produced television series starring Victoria Song of f(x), Calvin Chen of Fahrenheit and Zhou Mi of Super Junior-M.[1] The series premiered on GTV on 27 August 2012.
Victoria Song won the Best New Actress award at the China TV Drama Awards.
Young, talented, and handsome Qin Yujiang (Calvin Chen) receives orders to look for Chairman Yuan's long lost granddaughter, Shen Yayin (Victoria Song). As grandfather tried every means to separate her and her father, Ya Yin often moved houses and hid away from her grandfather since she was young. When her father died, Ya Yin dislikes her grandfather as she feels that he has ruined her childhood happiness and was part of the cause contributing to her father's death. Ya Yin's guardian plotted a plan for her own daughter, Yu Ru (Ya Yin's cousin) to impersonate as Ya Yin to dupe Chairman Yuan into thinking that she is actually his long-lost granddaughter. Yu Jiang gradually enters Ya Yin's heart but refuses to admit his love for her because she's Chairman Yuan's granddaughter. Ya Yin's evil cousin also became an obstacle between Ya Yin and Yu Jiang's love.
| Anhui TV ratings[2] | |||||
|---|---|---|---|---|---|
| Air date | Episode # | Ratings (%) | Audience share (%) | Rank | |
| 2012.08.27 | 1-2 | 0.76 | 2 | 8 | |
| 2012.08.28 | 3-4 | 0.81 | 2.12 | 8 | |
| 2012.08.29 | 5-6 | 0.81 | 2.14 | 8 | |
| 2012.08.30 | 7-8 | 0.74 | 1.94 | 8 | |
| 2012.08.31 | 9-10 | 0.72 | 1.87 | 7 | |
| 2012.09.01 | 11-12 | 0.83 | 2.12 | 7 | |
| 2012.09.02 | 13-14 | 0.79 | 2.04 | 7 | |
| 2012.09.03 | 15-16 | 0.91 | 2.46 | 1 | |
| 2012.09.04 | 17-18 | 0.99 | 2.73 | 1 | |
| 2012.09.05 | 19-20 | 0.94 | 2.55 | 3 | |
| 2012.09.06 | 21-22 | 0.91 | 2.45 | 5 | |
| 2012.09.07 | 23-24 | 0.98 | 2.63 | 4 | |
| 2012.09.08 | 25-26 | 0.92 | 2.57 | 4 | |
| 2012.09.09 | 27-28 | 0.83 | 2.16 | 7 | |
| 2012.09.10 | 29-30 | 1 | 2.64 | 5 | |
| 2012.09.11 | 31-32 | 1.1 | 2.84 | 4 | |