tgp_claim_mandate_of_heaven_effect

tgp_claim_mandate_of_heaven_effect = {
	save_scope_as = new_son_of_heaven
	set_variable = {
		name = new_son_of_heaven
		value = scope:new_son_of_heaven
		days = 2
	}
	every_vassal = {
		limit = {
			any_held_title = {
				OR = {
					exists = var:ceremonial_title
					exists = var:administrative_ui_special_title
				}
			}
		}
		random_held_title = {
			limit = { exists = var:ceremonial_title }
			save_scope_as = ceremonial_title
		}
		save_temporary_scope_as = ceremonial_liege
		# TGP end the ceremonial liege
		# MESSAGE
		hidden_effect = {
			every_player = {
				limit = { top_liege = scope:ceremonial_liege.top_liege }
				send_interface_message = {
					type = event_generic_bad
					title = tgp_destroy_ceremonial_liege_throne_title
					left_icon = scope:ceremonial_liege
					right_icon = scope:new_son_of_heaven
					show_as_tooltip = {
						scope:new_son_of_heaven = { destroy_title = scope:ceremonial_title }
						scope:ceremonial_liege = { add_trait = former_emperor }
					}
				}
			}
		}
		# Actually destroy
		scope:ceremonial_liege = { add_trait = former_emperor }
		scope:new_son_of_heaven = { destroy_title = scope:ceremonial_title }
	}
	set_variable = {
		name = claimed_mandate_var
		value = yes
		days = 30
	}
	# Grant the Hegemon title
	create_title_and_vassal_change = {
		type = created
		save_scope_as = mandate_change
		add_claim_on_loss = no
	}
	title:h_china = {
		change_title_holder = {
			holder = scope:new_son_of_heaven
			change = scope:mandate_change
		}
	}
	resolve_title_and_vassal_change = scope:mandate_change
	# destroy empire titles for merit hgemony, instead force them granting titles away
	if = {
		limit = {
			is_ai = yes
		}
		every_held_title = {
			title_tier = empire
			prev = { destroy_title = prev }
		}
	}
	# Adjust tributaries
	if = {
		limit = {
			number_of_tributaries > 0
		}
		# Vassalize tributaries within China (except if it's a player)
		create_title_and_vassal_change = {
			type = swear_fealty
			save_scope_as = mandate_vassalize_tributaries_change
		}
		every_tributary = {
			limit = {
				is_ai = yes
				primary_title = {
					target_is_de_jure_liege_or_above = title:h_china
				}
			}
			hidden_effect = { end_tributary = yes }
			change_liege = {
				liege = scope:new_son_of_heaven
				change = scope:mandate_vassalize_tributaries_change
			}
		}
		resolve_title_and_vassal_change = scope:mandate_vassalize_tributaries_change
		# Turn your other tributaries into hegemonic
		every_tributary = {
			custom = custom.every_tributary
			limit = {
				NAND = {
					is_ai = yes
					primary_title = {
						target_is_de_jure_liege_or_above = title:h_china
					}
				}
			}
			start_tributary = {
				contract_group = tributary_celestial
				suzerain = scope:new_son_of_heaven
			}
		}
	}
	scope:new_son_of_heaven = {
		# Get some gold back from any owned domicile
		nomad_domicile_refund_effect = yes
		# Become celestial
		if = {
			limit = {
				NOT = { government_has_flag = government_is_celestial }
			}
			tgp_domicile_conversion_when_changing_government_type = {

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