http://offers.perfectworld.com/
Survey / Survey of the Day
Under Survey there is one for 119 and other for 148 Zen. Do those and the two surveys of the day once a day. It will net you 2-4g a day, depending on how much time you are willing to put into it.
Create a new e-mail account for your PWI account, so you don't get spammed.
This is a very frustrating and time consuming process, so only do it when you desperately need money.
After you do get gold, you can try playing the gold market. Sell high / buy low. Weekends are when people get paychecks, so gold is low value on weekends. Also gold is high price right now because of tiger packs, so stop doing this when they are gone (May 4th). Look out for deals, items for low price (fire sales) and sell them for profit later.
