According to the original template file, I tried to create another tag that can integrate the TW address field in Contact Form 7.

cf7-tag.php

<?php
add_action( 'wpcf7_init', 'wpcf7_add_address_tag' );
function wpcf7_add_address_tag () {
    
    wp_enqueue_script( 'address-pick', get_template_directory_uri() . '/js/tw-city-selector/dist/tw-city-selector.min.js', array( 'jquery' ), true ) ;
    //Get the js file from https://github.com/dennykuo/tw-city-selector
    wpcf7_add_form_tag( array( 'address', 'address*' ), 
    //To-do: 還沒處理必填欄位的功能		       
    'wpcf7_add_address_tag_handler', array( 'name-attr' => true ) );
}
function wpcf7_add_address_tag_handler ( $tag ) {
/**
* 以下根據 Contact Form 原始檔案照抄
*/
    if ( empty( $tag->name ) ) {
		return '';
    }

    $validation_error = wpcf7_get_validation_error( $tag->name );

    $class = wpcf7_form_controls_class( $tag->type );
    
    $class .= ' wpcf7-validates-as-date'; //本來是用 date.php 改的，所以有這個 class，先不管

	if ( $validation_error ) {
		$class .= ' wpcf7-not-valid';
    }
    
    $atts = array();

    $atts['class'] = $tag->get_class_option( $class );
    $atts['id'] = $tag->get_id_option();
    if ( $tag->has_option( 'readonly' ) ) {
		$atts['readonly'] = 'readonly';
	}

	if ( $tag->is_required() ) {
		$atts['aria-required'] = 'true';
    }
    
    $value = (string) reset( $tag->values );

    $atts['aria-invalid'] = $validation_error ? 'true' : 'false';
    if ( $tag->has_option( 'placeholder' ) || $tag->has_option( 'watermark' ) ) {
		$atts['placeholder'] = $value;
		$value = '';
    }
    var_dump ($tag);
    $value = $tag -> get_default_option( $value );

	$value = wpcf7_get_hangover( $tag->name, $value );

    $atts['value'] = $value;
    if ( wpcf7_support_html5() ) {
		$atts['type'] = $tag->basetype;
	} else {
		$atts['type'] = 'text';
	}

	$atts['name'] = $tag->name;

	$atts = wpcf7_format_atts( $atts );
/**
* 照抄完畢，我還在研究各段的功能哈哈哈哈哈
*/	
/**
* 前端呈現的樣子
*/
    $html = sprintf(
	'<div role="tw-city-selector" data-has-zipcode><input id="street" class="street" /></div><span class="wpcf7-form-control-wrap %1$s"><input id="address-string" %2$s hidden/>%3$s</span>',
	sanitize_html_class( $tag->name ), $atts, $validation_error );
	//用 jQuery 的方法，把地址選擇外掛的值回傳到真正的 input 元素內
        add_action( 'wp_footer', function () { ?>
	    <script id="tw-selector">
		new TwCitySelector();
		(function($){
		$("document").ready( function() {
		    $("#street").change(function() {
			$("#address-string").val($( ".zipcode" ).val() + $(".county").val() + $(".district").val() + $(".street").val());
		    });
		})})(jQuery);
	    </script>
        <?php });	
    return $html;
}