Wireless Bridging between ASUS RT-N66U and TP-LINK TL-WR340G

My old router : TP-LINK TL-WR340G

newly purchased : ASUS RT-N66U




I need step by step help regarding bridging wirelessly my new (ASUS RT-N66U) and old (TP-LINK TL-WR340G) router.
I want my newly purchased ASUS RT-N66U as my primary router connected with Internet. and old TP-LINK TL-WR340G router as a 2nd router to extend the wifi range.




I already tried the available articles found in google but failed.
Ex: click here two wireless router)
click here



Please help me urgently !!!!

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