On May 15, Fenwei surveyed 20 coking coal mines in main production areas. Fifteen of them held prices stable and five raised prices. Coking coal stocks stayed at low levels at mines amid upbeat demand from coking plants. Gas coal prices in Shandong and Shaanxi rose by accumulative 20-80 yuan/t presently. Prices of high-sulfur primary coal were stable but some hike projections were heard. Salesmen surveyed by Fenwei were bullish over the short-term coking coal market, considering the falling Chinese yuan might dampen procurement for import coking coal yet domestic coking coal supply was limited.