Banks, Foreign Exchange and ATMs -- The main Bank of China branch is in a large tower on the corner of Yan'an Lu and Baiyu Jie, behind the Dalian Hotel on Zhongshan Guangchang (open Mon-Fri 8:30am-4:30pm). Traveler's checks and cash can be exchanged at window 32, and credit cards are handled at window 11 (both on the second floor). There are international ATMs next to the old Bank of China on Zhongshan Guangchang and inside the Nikko's shopping arcade.
Internet Access -- Buye Cheng Wangyuan (24 hr.; ¥3/40¢/20p per hour) is the most central Internet bar, located underground on the northwest corner of Shengli Guangchang. Dial-up is tel. 165 or 169.
Post Office -- The central post office is located several blocks north of Zhongshan Guangchang, on the corner of Shanghai Lu and Changjiang Lu (open May-Sept 8am-7pm; Oct-Apr 8am-6pm).
Visa Extensions -- Visa extensions are easy to obtain; you need only a passport and hotel registration to obtain one. Go to the PSB Exit/Entry Office on the corner of Yan'an Lu and Wuhan Jie (second floor; tel. 0411/8280-2722; open Mon-Fri 8-11:30am and 1-5pm). Extensions take 5 days to process.