Lotte Mart, the retail arm of South Korea's Lotte Group, is expected to sell some of its loss-making stores in China, a South Korean newspaper reported.

But it is finding it hard to sell the stores at a decent price or even find a proper buyer at a time when the hypermarket format is no longer attractive to local consumers.

The South Korean retailer is in negotiations with potential Chinese buyers to sell 20-30 of its loss-making stores. At present, 90 percent of its 74 hypermarkets are no longer in operation, according to Aju Business Daily.