Many retail investors in China are trying to get into the commodities market as a rebound in prices continues. And, not too surprisingly, brokerage firms in China are enjoying a jump in account applications.

One needs to complete a web-based video verification as part of the application to open a commodity futures trading account. It's a process that more and more people are lining up for as they seek to get into the game.

Futures brokers say their systems are a bit overloaded with new applications and only one in five people can get through right now.

"This is the first time in our history that we face such huge traffic. It slows down our internet platform," said Yu Jie, futures broker.

Qian Zhongping is an investor who decided he couldn't wait. He went to the brokerage, hoping a face to face application could speed up the process.

"I am opening an account today. Many of my friends are trading now because the market is hot. I want to get into deformed steel bar trading because this commodity is having big fluctuations in prices. There's room for arbitrage," said Qian Zhongping, investor.

The enthusiasm of retail investors is raising alarms for experts. Officials from the Shanghai Futures Exchange say speculators need to be cautious, as commodities trading usually carries more risks than stock speculation.

"The hotter the market is, the more we need to remind investors to think independently and rationally. Commodity is an investment target for very professional traders. People need to make full considerations before joining," said Yao Guang, director of Energy & Chem. Commission, SFE.

Trading account applications surged an estimated 30 percent from March to April in China, and deposits also went up 10 to 15 percent. That's a drastic contrast with last year.