I understand there is no metro line to Hubu Alley, then which bus shall I take from Yangjiawan

Take bus 572 to Huquanjie Ditie Yangjiawan zhan, you will see the subway station.

Do you mean I can take subway from Huquanjie Ditie (Huquan subway station) to Hubu Alley? Which subway station shall I stop? Thanks

Sorry I just found I misunderstood your question, and I gave the answer to Yangjiawan from Hubu Alley.
For the question, no subway is available, but you can walk west for 5mins to Xiongchu Dadao BRT Chupinglu to take bus 15 to Minzhulu Simenkou. Then, walk west for 5mins to the alley.