what bus should i take going to chengdu high tech zone broad townscape or subway,,

Which exact place of the high tech zone do you refer to?
There are many bus tops in this area. As I know, bus no.4, 40, 84, 91, 93, 111, 115, 120, 121, 133, 153, 184, 225, 298, 404, 406, 501, 521, 823 can take you the High Tech Area.
If you take subway, you won't reach the broad townscape.