Regular expression collection problems, please help me, online, etc.-php Tutorial

Regular expression acquisition problems, please help, online and other target page http://www.weather.com.cn/weather1d/101070101.shtml
Desired value
1. 448th lines of page source code,

Update

Value in the html tag
2. data between rows 586th and 730 (which day, number, weather condition, maximum temperature and minimum temperature, wind direction and wind power) is a total of 7 days of data.

Please help me. Regular expressions cannot be written.

Reply to discussion (solution)

PHPQuery can be used, similar to JQuery

The regular expression for the first question is:

\ D {4}-\ d {2}-\ d {2} \ d {2}: \ d {2} update <\/p>

The second question is too many. I am still reading it.