Experimental: Ruxolitinib combined with Chidamide. All recipients in this arm received the modified Bu/Cy conditioning regimen intensified by Ruxolitinib and Chidamide. The conditioning regimen for allogeneic hematopoietic stem cell transplantation consist of ruxolitinib (35 mg bid [p.o.], days -15 to -10, diminishing to day -1), chidamide (30 mg/day, twice per week from days -15 to -2), cytarabine (4g/m2/day, days -10 to -9), busulfan (0.8mg/kg, Q6h, days -8 to -6), cyclophosphamide (1.8 g/m2/day, days -5 to -4), carmustine(BCNU) (250mg/m2/day, day -3)

Drug: modified By/Cy conditioning regimen intensified by Ruxolitinib and Chidamide .

Day -15 # Ruxolitinib 70mg bid, Chidamide 30 mg once; Day -14 # Ruxolitinib 70mg bid; Day -13 # Ruxolitinib 70mg bid; Day -12 # Ruxolitinib 70mg bid, Chidamide 30 mg once; Day -11 # Ruxolitinib 70mg bid; Day-10# Cytarabine 4g/m2/day CI , Ruxolitinib 60mg bid; Day- 9# Cytarabine 4g/m2/day CI, Ruxolitinib 60mg bid; Day- 8 # Busulfan 0.8mg/ kg Q6h iv, Ruxolitinib 50mg bid, Chidamide 30 mg once; Day- 7# Busulfan 0.8mg/ kg Q6h iv, Ruxolitinib 50mg bid; Day-6# Busulfan 0.8mg/kg Q6h iv, Ruxolitinib 40mg bid; Day-5# Cyclophosphamide 1.8 g/m2/day CI, Ruxolitinib 30mg bid, Chidamide 30 mg once; Day-4# Cyclophosphamide 1.8 g/m2/day CI,Ruxolitinib 20mg bid; Day-3# Carmustine 250mg/m2/ day iv, Ruxolitinib 10mg bid; Day-2# Ruxolitinib 5mg bid, Chidamide 30 mg/day; Day-1# Ruxolitinib 5mg qd;

Defined as the proportion of participants whose underlying malignancy relapsed.

DFS was defined as survival with no evidence of relapse or progression.

Defined as the proportion of subjects who died due to causes other than malignancy relapse.