How we can go to Longtou apartment from Beijing West Railway Station ?

Do you refer to the one at No. 8 West Road, Nanxinyuan, Chaoyang District? If so, upon your arrival at the West Railway Station, take the shuttle bus to Military Museum. Then walk to the Military Museum MTR Station to take subway line 1 to Guomao MTR Station, where transfer to subway line 10 to Jinsong Station, from where I suggest you take a taxi exactly to the apartment very fast.