if they come out of bankruptcy will i be able to make a profit over the next years if the company takes off again an has no debts left?
Will I be able to trade my shares like normal if they come out of bankruptcy? Is it likely that I can still make a profit if they go bankrupt pay of the creditors and the business takes off again?

What most companies do when they come out of bankruptcy is restructure their entire share system. Its really hard to say whether or not you are still going to get a piece of the new pie although more often than not you don't. These new shares can be traded normally on the market.
Read up on the history of companies like Delta Airlines and Air Canada. They will give two different scenarios of how companies emerge out of bankruptcy.

example website shown IPO for " bidu " is 8/4/05 , but the price history shown the first day trading starting on 8/5/05
please help

You got to be clear on a few dates related to IPO's.
IPO Subscription begin date: The data when you can put in an application for buying the shares offered.
IPO Subscription end date: Last date of acceptance of applications for buying the shares as part of IPO.
IPO Allotment date: The date when the company offering the shares declares the names of the poeple who have been alloted shares that can be traded at a later date when the IPO lists on the stock exchange.
IPO Listing Date: The date when the IPO lists on the stock exchange, so that it can be traded. At this time, it can be traded by any one.



