You can get a Laos visa here, but it's easier and no more expensive to get one at the border. The consulate is on the left bank of the river, a ¥15 to ¥20 ride from the centre of town.
Changes travellers cheques and foreign currency, and has an ATM machine. There are other branches on Galan Zhonglu and Minhang Lu.
Border control on the Chinese side of the China–Laos border.
The best bet for having an English-speaker available.
One of a number of branches around town.
You can send mail overseas from here.
Come here for visa extensions.