great_project_reward_contribution_completion_actual_reward_effect

great_project_reward_contribution_completion_actual_reward_effect = {
	# A great project outlives some of its contributors, and the dead take no reward
	if = {
		limit = {
			is_alive = yes
			is_valid_for_legitimacy_change = yes
		}
		add_legitimacy = {
			value = $LEGITIMACY_GAIN$
			if = {
				limit = {
					any_character_situation = {
						situation_type = dynastic_cycle
						has_situation_top_phase_parameter = dynastic_cycle_great_projects_increased_legitimacy
					}
				}
				multiply = 2
			}
		}
	}
	else_if = {
		limit = { is_alive = yes }
		if = {
			limit = { government_has_flag = government_has_influence }
			change_influence = $INFLUENCE_GAIN$
		}

		if = {
			limit = { is_governor = yes }
			increase_governance_effect = { VALUE = $GOVERNANCE_GAIN$ }
			add_prestige = $PRESTIGE_GAIN_WITH_GOVERNANCE$
		}
		else_if = {
			limit = { is_clergy = yes }
			add_piety = $PIETY_GAIN$
		}
		else = {
			add_prestige = $PRESTIGE_GAIN_FALLBACK$
		}
		if = {
			limit = {
				government_allows = merit
				this != title:h_china.holder # Chinese Emperor does not "use" merit
			}
			change_merit = $MERIT_GAIN$
		}
	}
	$EXTRA_EFFECT$ = yes
}

As written in game/common/scripted_effects/10_dlc_tgp_scripted_effects.txt.