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:
Visa policy of China
Table title:
Eligible ports of entry
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Port of entry </th><th colspan=1 rowspan=1 > Areas permitted to stay </th><th colspan=1 rowspan=1 > Maximum length of stay </th><th colspan=1 rowspan=1 > Effective date </th><th colspan=1 rowspan=1 > Reference </th></tr>
<tr> <td colspan=1 rowspan=1 > Beijing Capital International Airport </td><td colspan=1 rowspan=1 > Beijing, Tianjin and Hebei Province </td><td colspan=1 rowspan=1 > 144 hours </td><td colspan=1 rowspan=1 > 2017/12/28 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Beijing West Railway Station for passengers traveling on the Beijing-Kowloon Through Train only. </td><td colspan=1 rowspan=1 > Beijing, Tianjin and Hebei Province </td><td colspan=1 rowspan=1 > 144 hours </td><td colspan=1 rowspan=1 > 2017/12/28 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Chengdu Shuangliu International Airport </td><td colspan=1 rowspan=1 > Chengdu </td><td colspan=1 rowspan=1 > 144 hours </td><td colspan=1 rowspan=1 > 2019/1/1 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Dalian Zhoushuizi International Airport </td><td class="highlighted"  colspan=1 rowspan=1 > Liaoning Province </td><td class="highlighted"  colspan=1 rowspan=1 > 144 hours </td><td class="highlighted"  colspan=1 rowspan=1 > 2018/1/1 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Guangzhou Baiyun International Airport </td><td colspan=1 rowspan=1 > Guangdong Province </td><td colspan=1 rowspan=1 > 144 hours </td><td colspan=1 rowspan=1 > 2019/5/1 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Hangzhou Xiaoshan International Airport </td><td colspan=1 rowspan=1 > Shanghai, Jiangsu Province and Zhejiang Province </td><td colspan=1 rowspan=1 > 144 hours </td><td colspan=1 rowspan=1 > 2016/1/30 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Jieyang Chaoshan International Airport </td><td colspan=1 rowspan=1 > Guangdong Province </td><td colspan=1 rowspan=1 > 144 hours </td><td colspan=1 rowspan=1 > 2019/5/1 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Kunming Changshui International Airport </td><td colspan=1 rowspan=1 > Kunming </td><td colspan=1 rowspan=1 > 144 hours </td><td colspan=1 rowspan=1 > 2019/1/1 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Nanjing Lukou International Airport </td><td colspan=1 rowspan=1 > Shanghai, Jiangsu Province and Zhejiang Province </td><td colspan=1 rowspan=1 > 144 hours </td><td colspan=1 rowspan=1 > 2016/1/30 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Qinhuangdao Sea Port </td><td colspan=1 rowspan=1 > Beijing, Tianjin and Hebei Province </td><td colspan=1 rowspan=1 > 144 hours </td><td colspan=1 rowspan=1 > 2017/12/28 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Qingdao Liuting International Airport </td><td colspan=1 rowspan=1 > Shandong Province </td><td colspan=1 rowspan=1 > 144 hours </td><td colspan=1 rowspan=1 > 2019/1/1 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Qingdao Sea Port </td><td colspan=1 rowspan=1 > Shandong Province </td><td colspan=1 rowspan=1 > 144 hours </td><td colspan=1 rowspan=1 > 2019/1/1 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Shanghai Hongqiao International Airport </td><td colspan=1 rowspan=1 > Shanghai, Jiangsu Province and Zhejiang Province </td><td colspan=1 rowspan=1 > 144 hours </td><td colspan=1 rowspan=1 > 2016/1/30 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Shanghai Port International Cruise Terminal </td><td colspan=1 rowspan=1 > Shanghai, Jiangsu Province and Zhejiang Province </td><td colspan=1 rowspan=1 > 144 hours </td><td colspan=1 rowspan=1 > 2016/1/30 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Shanghai Pudong International Airport </td><td colspan=1 rowspan=1 > Shanghai, Jiangsu Province and Zhejiang Province </td><td colspan=1 rowspan=1 > 144 hours </td><td colspan=1 rowspan=1 > 2016/1/30 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Shanghai Railway Station for passengers traveling on the Shanghai-Kowloon Through Train only. </td><td colspan=1 rowspan=1 > Shanghai, Jiangsu Province and Zhejiang Province </td><td colspan=1 rowspan=1 > 144 hours </td><td colspan=1 rowspan=1 > 2016/1/30 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Shanghai Wusongkou International Cruise Terminal </td><td colspan=1 rowspan=1 > Shanghai, Jiangsu Province and Zhejiang Province </td><td colspan=1 rowspan=1 > 144 hours </td><td colspan=1 rowspan=1 > 2016/1/30 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Shenyang Taoxian International Airport </td><td class="highlighted"  colspan=1 rowspan=1 > Liaoning Province </td><td class="highlighted"  colspan=1 rowspan=1 > 144 hours </td><td class="highlighted"  colspan=1 rowspan=1 > 2018/1/1 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Shenzhen Bao'an International Airport </td><td colspan=1 rowspan=1 > Guangdong Province </td><td colspan=1 rowspan=1 > 144 hours </td><td colspan=1 rowspan=1 > 2019/5/1 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Shijiazhuang Zhengding International Airport </td><td colspan=1 rowspan=1 > Beijing, Tianjin and Hebei Province </td><td colspan=1 rowspan=1 > 144 hours </td><td colspan=1 rowspan=1 > 2017/12/28 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Tianjin Binhai International Airport </td><td colspan=1 rowspan=1 > Beijing, Tianjin and Hebei Province </td><td colspan=1 rowspan=1 > 144 hours </td><td colspan=1 rowspan=1 > 2017/12/28 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Tianjin International Cruise Home Port </td><td colspan=1 rowspan=1 > Beijing, Tianjin and Hebei Province </td><td colspan=1 rowspan=1 > 144 hours </td><td colspan=1 rowspan=1 > 2017/12/28 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Wuhan Tianhe International Airport </td><td colspan=1 rowspan=1 > Wuhan </td><td colspan=1 rowspan=1 > 144 hours </td><td colspan=1 rowspan=1 > 2019/1/1 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Xiamen Gaoqi International Airport </td><td colspan=1 rowspan=1 > Xiamen </td><td colspan=1 rowspan=1 > 144 hours </td><td colspan=1 rowspan=1 > 2019/1/1 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Xiamen Sea Port </td><td colspan=1 rowspan=1 > Xiamen </td><td colspan=1 rowspan=1 > 144 hours </td><td colspan=1 rowspan=1 > 2019/1/1 </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
On what date did the 144 hour policy expansion to Shenyang and Dalian take place? 
Answer:
The 144-hour policy was expanded to Shenyang and Dalian in Liaoning Province on 1 January 2018.