假設你是李華，你的筆友Jason 對中國文化非常感興趣，打算來中國參觀一些世界文化遺產(chǎn)．請你根據(jù)所給信息，給Jason寫一封電子郵件，介紹洛陽的龍門石窟．
名稱龍門石窟（Longmen Grottoes）
地理位置位于河南省洛陽市南郊的伊河兩岸，離市區(qū)12.5公里．
開鑿時間從北魏至北宋，歷經(jīng)400多年．
藝術價值①是中國古代雕刻藝術的重要組成部分，現(xiàn)存有窟龕（niche）2300多個，造像（image）10萬余尊；
②反映了中國古代政治、經(jīng)濟（economy）、宗教、文化等許多領域的發(fā)展變化．
注意：1．詞數(shù)100左右（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．
Dear Jason，
I am glad to know you are coming to visit China．I am writing to recommend one of the World Heritage Sites in China-Longmen Grottoes．

The Longmen Grottoes stand on the banks of the Yi River，12.5 kilometers south of Luoyang City in Henan Province．The carving project began in the Northern Wei Dynasty and lasted for more than 400 years until the Northern Song Dynasty．At present there are over 2，300 niches，more than 100，000 images．The grottoes are an important part of ancient Chinese sculptures，and show great changes in ancient Chinese politics，economy，religion，culture and so on．
The Longmen Grottoes is well worth a visit because of its long history and natural beauty．

The Longmen Grottoes stand on the banks of the Yi River，12.5 kilometers south of Luoyang City in Henan Province．The carving project began in the Northern Wei Dynasty and lasted for more than 400 years until the Northern Song Dynasty．At present there are over 2，300 niches，more than 100，000 images．The grottoes are an important part of ancient Chinese sculptures，and show great changes in ancient Chinese politics，economy，religion，culture and so on．
The Longmen Grottoes is well worth a visit because of its long history and natural beauty．

I hope you'll have a good time in China．
Yours，
Li Hua．