The business contracts in the Tang Dy-nasty were basically conducted according to the regulations of the state law, and the tradingorder was constructed under the direction of the state law.
唐代卖买契约，基本是依照法律令进行的程序和活动，是在法律指导下形成的秩序。
2
To organize and implement management order supervision and administration of kinds of market, furthermore, to undertake the administration and registration of various trading market and trade fair.
组织实施各类市场经营秩序的规范管理和监督，并承担各类交易市场及商品展销会的登记管理职能。
3
The online trading application then requests the user to confirm the buy order and enforces a timeout period for the user to confirm the order.