D1, Z1, T1, N1, L1, A1

As of last weekend, I have finished taking all trains numbered ones. They are D1 from Beijing to Shenyang north, Z1 from Beijing to Shanghai, T1 from Beijing west to Changsha, N1 from Harbin east to Mudanjiang, L1 from Beijing to Harbin, and A1 from Harbin east to Suihua.