积极

make positive contributions (to)

have a positive influence/effect/impact (on)

play a positive/constructive role

mobilize all positive factors

take positive steps

change in the positive way; change for the better

adopt a positive attitude (to)

respond favourably (to)

He is always enthusiastic about social work. / He's always public-spirited.

He is active in work.

vigorous supporter

be zealous for progress

set high goals for oneself; make progress in an active way

make active efforts

cooperate actively