I want business visa for China, how much expense & in how many days,what documents are required.

Arif, the expense for a single entry type is Rs 4977, including Rs 3900 charged by the consular office and Rs 1077 charged by the CVASC office. You can get it at the fourth business day after you submit the application. Generally speaking, you need to submit your valid passport, a photocopy of the passport's data page, a completely filled application form affixed with your color bare-headed photo taken within six months, an invitatin letter from your trade partner in PRC, and a personal written statement.