No entrance fee, you only need to present your ID and pass through security checks.
Wikipedia https://zh.wikipedia.org/wiki/中銀大廈_(香港)
Official website http://www.bochk.com/en/aboutus/corpprofile/boctower.html
地址 1 Garden Rd, Central, Hong Kong
坐标 22°16'48.744" N 114°9'36.493" E
