Can somebody show me the nearest direction from which exit of San Yuan Lie metro station

You may refer to Guihuagang Bag Wholesale near Sanyuanli. Well, get out from Exit A1 of Snayuanli MTR Station and walk southwards along Sanyuanli Avenue for about 800m. You will see a Zhonggang Leather Products Commercial and Trade City, which is very near from your destination.