Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Duncan Chow
Table title:
List of Duncan Chow's TV Series
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 > TV Show </th><th colspan=1 rowspan=1 > Character </th><th colspan=1 rowspan=1 > Partners </th><th colspan=1 rowspan=1 > Region </th></tr>
<tr> <td colspan=1 rowspan=3 > 2001 </td><td colspan=1 rowspan=1 > Devils' Blues </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Jade Leung, Tai Ping Hui </td><td colspan=1 rowspan=1 > Singapore, Hong Kong, Taiwan </td></tr>
<tr> <td colspan=1 rowspan=1 > Six Friends </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Xiao S </td><td colspan=1 rowspan=11 > Taiwan </td></tr>
<tr> <td colspan=1 rowspan=1 > Peach Girl </td><td colspan=1 rowspan=1 > Lu Wu Lang </td><td colspan=1 rowspan=1 > Vanness Wu, Annie Wu </td></tr>
<tr> <td colspan=1 rowspan=4 > 2002 </td><td colspan=1 rowspan=1 > Come to my place </td><td colspan=1 rowspan=1 > Cameo </td><td colspan=1 rowspan=1 > F4 </td></tr>
<tr> <td colspan=1 rowspan=1 > Purple Corner </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Two-faced Godfather </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Bobby Dou, Joyce Tsang </td></tr>
<tr> <td colspan=1 rowspan=1 > Odyssey </td><td colspan=1 rowspan=1 > Tang President </td><td colspan=1 rowspan=1 > Bobby Dou, Beatrice Hsu </td></tr>
<tr> <td colspan=1 rowspan=2 > 2003 </td><td colspan=1 rowspan=1 > Hi! Working Girl </td><td colspan=1 rowspan=1 > Heavenly King's manager </td><td colspan=1 rowspan=1 > Ken Chu, Jolin Tsai, Show Lo </td></tr>
<tr> <td colspan=1 rowspan=1 > Heart Train </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=2 > 2004 </td><td colspan=1 rowspan=1 > Lover of Herb </td><td colspan=1 rowspan=1 > Yang Shou Zhi </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > The legend of speed </td><td colspan=1 rowspan=1 > Du Bian Si / Ah Si </td><td colspan=1 rowspan=1 > Rainie Yang </td></tr>
<tr> <td colspan=1 rowspan=1 > 2006 </td><td colspan=1 rowspan=1 > Hua Yang Shao Nian Shao Nu (Hana Kimi) </td><td colspan=1 rowspan=1 > Yuan Qiu Ye (Cameo) </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2007 </td><td colspan=1 rowspan=1 > The Gold Convoyers (Biao Hang Tian Xia) </td><td colspan=1 rowspan=1 > Wang Zhenwei </td><td colspan=1 rowspan=1 > David Chiang, Wu Xiao Min, Ken Chang, Zhao Liying </td><td colspan=1 rowspan=1 > Mainland China </td></tr>
<tr> <td colspan=1 rowspan=1 > 2008 </td><td colspan=1 rowspan=1 > Prince + Princess 2 </td><td colspan=1 rowspan=1 > Teacher </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=2 > Taiwan </td></tr>
<tr> <td colspan=1 rowspan=1 > 2008 </td><td colspan=1 rowspan=1 > Magnolia Flower </td><td colspan=1 rowspan=1 > Chen Xi </td><td colspan=1 rowspan=1 > Annie Wu, Stephanie Xiao </td></tr>
<tr> <td colspan=1 rowspan=1 > 2010 </td><td colspan=1 rowspan=1 > The Winner is King </td><td colspan=1 rowspan=1 > A Mao </td><td colspan=1 rowspan=1 > Julien Cheung, Ada Choi </td><td colspan=1 rowspan=1 > Hong Kong </td></tr>
<tr> <td colspan=1 rowspan=1 > 2011 </td><td colspan=1 rowspan=1 > Medical Examiner Shinomiya Hazuki (Season 10) </td><td colspan=1 rowspan=1 > Yusuke Tsuruta </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=2 > Japan </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=3 > 2012 </td><td colspan=1 rowspan=1 > Mameshiba Ichiro Futen no Shiba Jiro </td><td colspan=1 rowspan=1 > Gondo Shigeru </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > What is love </td><td colspan=1 rowspan=1 > Zhang Shao Qian </td><td colspan=1 rowspan=1 > Jade Chou, Chris Wu </td><td class="highlighted"  colspan=1 rowspan=8 > Taiwan </td></tr>
<tr> <td colspan=1 rowspan=1 > Lady Maid Maid </td><td colspan=1 rowspan=1 > Luo Jia Liang / "Andy Lo" </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=2 > 2013 </td><td colspan=1 rowspan=1 > Falling </td><td colspan=1 rowspan=1 > Zhang Lu Huai </td><td colspan=1 rowspan=1 > Jade Chou, Esther Liu </td></tr>
<tr> <td colspan=1 rowspan=1 > Happy 300 Days </td><td colspan=1 rowspan=1 > Jun Jie </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2014 </td><td colspan=1 rowspan=1 > Mr. Right Wanted </td><td colspan=1 rowspan=1 > Cameo </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2014-2015 </td><td colspan=1 rowspan=1 > Dear Mom </td><td colspan=1 rowspan=1 > Xu Ji Kuan </td><td colspan=1 rowspan=1 > Xiao Xun, Linh Hong, Joane Tsang </td></tr>
<tr> <td colspan=1 rowspan=1 > 2015 </td><td colspan=1 rowspan=1 > Love Cuisine </td><td colspan=1 rowspan=1 > Wen Zhen Yu </td><td colspan=1 rowspan=1 > Lego Lee, Allison Lin, Nita Lei </td></tr>
<tr> <td colspan=1 rowspan=2 > 2016 </td><td colspan=1 rowspan=1 > Rock Records in Love </td><td colspan=1 rowspan=1 > Kevin </td><td colspan=1 rowspan=1 > Lego Lee </td></tr>
<tr> <td colspan=1 rowspan=1 > The Hiddens </td><td colspan=1 rowspan=1 > Chen Chi Keung </td><td colspan=1 rowspan=1 > Jessica Hsuan, Lawrence Ng, Michael Tao, William So, Wylie Chiu, Lu Jing-Jing </td><td colspan=1 rowspan=2 > Hong Kong </td></tr>
<tr> <td colspan=1 rowspan=1 > 2017 </td><td colspan=1 rowspan=1 > OCTB </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Jordan Chan, Danny Chan </td></tr>
</table>
Question:
when did return to the TV series What is love ?
Answer:
In 2012, Duncan Chow returned to Taiwan to join the TV series What is love.