Children love to watch it, and they have gained something! It is worthy of being a documentary made by CCTV for young children! Children love to watch it, and they have gained something! It is worthy of being a documentary made by CCTV for young children! Children love to watch it, and they have gained something! It is worthy of being a documentary made by CCTV for young children! Children love to watch it, and they have gained something! It is worthy of being a documentary made by CCTV for young children! Children love to watch it, and they have gained something! It is worthy of being a documentary made by CCTV for young children! Children love to watch it, and they have gained something! It is worthy of being a documentary made by CCTV for young children! Children love to watch it, and they have gained something! It is worthy of being a documentary made by CCTV for young children! Children love to watch it, and they have gained something! It is worthy of being a documentary made by CCTV for young children!