假如你是李華，收到一封署名為David的網友的求助信．信中他向你訴說了自己的困擾：近日，他在學習中國文化時，在博客中看到了下面兩幅圖片，但對其含義不是很理解．請你用英語給他寫一封回信做出解釋．

寫作要求：
1．信的開頭和結尾已給出，但不計入總詞數(shù)．
2．可以適當增加細節(jié)，以使行文連貫．
 3．詞數(shù)不少于100．
4．參考詞匯：對……孝順 be dutiful to；美德 virtue；博客 blog
Dear David，
I'm glad to receive your letter and know you're learning the Chinese culture．

The pictures you have seen in the blog show the Chinese traditional virtue that the children should be dutiful to the parents．
In Picture One，a young father is washing feet for his old mother，setting a good example for his little son．And in Picture Two，the son who has grown up is helping his father by the arm，who has turned old．That's to say，the son is dutiful to his father as his father does to his mother in Picture One．
In my opinion，the pictures tell us that if we are dutiful to the old when we are young，our next generation will carry forward the fine tradition．
I hope my explanation can be helpful to you，and look forward to your reply．

The pictures you have seen in the blog show the Chinese traditional virtue that the children should be dutiful to the parents．
In Picture One，a young father is washing feet for his old mother，setting a good example for his little son．And in Picture Two，the son who has grown up is helping his father by the arm，who has turned old．That's to say，the son is dutiful to his father as his father does to his mother in Picture One．
In my opinion，the pictures tell us that if we are dutiful to the old when we are young，our next generation will carry forward the fine tradition．
I hope my explanation can be helpful to you，and look forward to your reply．

Yours Sincerely，
Li Hua