add html ref to popup marker

folium_html_marker.py

import folium

ref_html = r'<a href="http://www.shenyang.gov.cn/" target="_blank"> I am here </a>'
pop_html = folium.Popup(folium.Html(ref_html, script=True))

map_1 = folium.Map(location=[41.8057, 123.4315], zoom_start=12,
                   tiles='Stamen Terrain')
folium.Marker(
    location = [41.8057, 123.4315], 
    popup = pop_html).add_to(map_1)

# map_1.save('marker_html.html')

map_1