You can do the following to get all href tags with the text of [01-20] to open and go back.

driver.get('http://www.csisc.cn/zbscbzw/isinbm/index_list_code.shtml')
while True:
    hrefs=[link.get_attribute('href') for link in driver.find_elements_by_xpath("//td[text()='[01-20]']/preceding::td[1]/a")]
    for href in hrefs:
        driver.get(href)
        driver.back()
    if(len(hrefs)< 20):
        break
    try:
        #next_page = driver.find_element_by_xpath("//font[text()='Next page']/ancestor::a")
        next_page = driver.find_element_by_link_text("下一页")
        next_page.click()
    except:
        print('No more pages')
        break

I am trying to click all links (and get elements) in a specific date (like today), else quit if it is published (like yesterday).

I use if-elif to achieve it but the website just continue clicking links despite of date, please find my codes here:

Any help will be highly appreciated!

dates = [date.get_attribute('innerHTML') for date in driver.find_elements_by_xpath('')]
for date in dates:
     if date == '[01-20]':
        links = [link.get_attribute('href') for link in driver.find_elements_by_xpath('')]
        for link in links:
            driver.get(link)
        next_page = driver.find_element_by_link_text('')
        next_page.click()
     elif date != '[01-20]': 
       driver.close()