For Zhu Zhangjin, the boss of a furniture factory in eastern China, the cost of finance is still one of the “mountains” weighing on his business’s profitability. Borrowing costs are the “highest among all major economies,” said Zhu, chairman of Zhejiang province-based Kasen International Holdings Ltd., naming rising labor expenses and tax rates as other headaches. Zhu’s company, which employs about 5,000 people and exports sofas and car seats to the U.S. and Europe, is one of the nation’s labor-intensive, made-in-China businesses that have underpinned three decades of growth.