Depart at 9h 30 Am From sa pa town for a day trip to Sin chai, where you will visit silver water fall and heaven gate. After few hours of walking,the main paved road becomes a dirt path and here is  sin chai village, It is a Black H’mong village, here you can discover the daily life of H’mong, enjoy the beautifull landscape and then continue trek through the forest on the buffalo trails which lead you to the silver waterfall, have lunch near the water fall, after lunch you will be walking to the Heaven gate(the highest pass in Viet nam 2100 m). return sa pa by Jeep or motor bike.