Yes, in the novel Joy of Life, Liu Ruyu was Fan Xian's stepmother and also his legitimate mother in name, so she was the first wife.

Liu Ruyu in Joy of Life was Fan Jian's concubine, not his wife. Even though Fan Jian had married Liu Ruyu, due to his guilt towards his ex-wife, Fan Jian had never promoted Liu Ruyu to the main wife. Therefore, Liu Ruyu's status had always been a concubine. Fan Xian addressing Liu Ruyu as aunt further confirmed this point. Therefore, it could be confirmed that Liu Ruyu was Fan Jian's concubine.
The Liu Ruyu in Joy of Life was not Fan Jian's wife, but his concubine. Even though Liu Ruyu had a very high status in the Fan manor, Fan Jian had never promoted her to be the main wife. Instead, he treated her as a concubine. Fan Jian didn't go through the relevant procedures, indicating that Liu Ruyu was the main wife of the Fan family. This was also the reason why Liu Ruyu was addressed as YiNiang and not Second Mother. Therefore, Liu Ruyu in Joy of Life was not the main wife.
Liu Ruyu in Joy of Life was Fan Jian's concubine, not his wife. Although Fan Jian had married Liu Ruyu, due to his guilt towards his ex-wife, Fan Jian had never promoted Liu Ruyu to the main wife. Therefore, Liu Ruyu's status had always been a concubine. Fan Xian addressing Liu Ruyu as aunt further confirmed this point. Therefore, Liu Ruyu in Joy of Life was Fan Jian's concubine.
Liu Ruyu in Joy of Life was Fan Jian's concubine, not his wife. Although Fan Jian had married Liu Ruyu, due to his guilt towards his ex-wife, Fan Jian had never promoted Liu Ruyu to the main wife. Therefore, Liu Ruyu's status had always been a concubine. Fan Xian addressed Liu Ruyu as aunt, further confirming this point. Therefore, Liu Ruyu in Joy of Life was Fan Jian's concubine.
Liu Ruyu was Fan Jian's concubine, not his wife. Although Fan Jian had married Liu Ruyu, due to his guilt towards his ex-wife, Fan Jian had never promoted Liu Ruyu to the main wife. Therefore, Liu Ruyu's status had always been a concubine. Fan Xian addressing Liu Ruyu as aunt further confirmed this point. Therefore, Liu Ruyu in the middle of the Qing Dynasty was Fan Jian's concubine.
Liu Ruyu in Joy of Life was Fan Jian's concubine, not his wife. Even though Fan Jian had married Liu Ruyu, due to his guilt towards his ex-wife, Fan Jian had never promoted Liu Ruyu to the main wife. Therefore, Liu Ruyu's status had always been a concubine. Fan Xian addressing Liu Ruyu as aunt further confirmed this point. Therefore, Liu Ruyu in Joy of Life was Fan Jian's concubine.
Liu Ruyu wasn't Fan Jian's wife. Although she had a high status in the Fan manor, Fan Jian had never promoted her to the main wife. Instead, he treated her as a concubine. Fan Jian didn't go through the relevant procedures, indicating that Liu Ruyu was the main wife of the Fan family. This was also one of the reasons why Liu Ruyu was addressed as YiNiang and not Second Mother. Although Fan Jian had deep feelings for Liu Ruyu, he had never married anyone else, and Liu Ruyu did not care about status and status. Therefore, according to the information provided, Liu Ruyu was not Fan Jian's wife.
The Liu Ruyu in Joy of Life was not Fan Jian's wife, but his concubine. Even though Liu Ruyu had a very high status in the Fan manor, Fan Jian had never promoted her to be the main wife. Instead, he treated her as a concubine. Fan Jian didn't go through the relevant procedures, indicating that Liu Ruyu was the main wife of the Fan family. This was also one of the reasons why Liu Ruyu was addressed as YiNiang and not Second Mother. Therefore, Liu Ruyu in Joy of Life was not the main wife.
Liu Ruyu was Fan Jian's concubine, not his wife. Even though Fan Jian had married Liu Ruyu, due to his guilt towards his ex-wife, Fan Jian had never promoted Liu Ruyu to the main wife. Therefore, Liu Ruyu's status had always been a concubine. Fan Xian addressing Liu Ruyu as aunt further confirmed this point. Therefore, Liu Ruyu in the middle of the Qing Dynasty was Fan Jian's concubine.
Liu Ruyu in Joy of Life was Fan Jian's concubine, not his wife. Although Fan Jian had married Liu Ruyu, due to his guilt towards his ex-wife, Fan Jian had never promoted Liu Ruyu to the main wife. Therefore, Liu Ruyu's status had always been a concubine. Fan Xian addressing Liu Ruyu as aunt further confirmed this point. Therefore, Liu Ruyu in Joy of Life was Fan Jian's concubine.