trip to china

hi im goin to travel in china and visit few cities there.. is my route can save train fare? beijing-suzhou-shanghai-hangzhou-xian-lhasa-chengdu-kunming-guangzhou-h.kong

2. is safe to travel? in your opinion how much my transportation cost in my internary? tq

3.im plan go on march2017.. is march is good to travel? tq