My requirement is that I can flow order information from any module to any other module. For example I want to create Request for Quotation  in "Purchase.Order" when I create Quotation Order in Sale.Order.

I want to push customer, product line  "Purchase.Order" sametime when someone create Quotation.

Just for Testing I modified Odoo Sale.Order and Purchase.Order module itself. 

@api.model
def create(self, vals):
    .......
    
    self.env['purchase.order'].create(vals)
    return result

Please check create method code in this link

and Pass vals Directly to create method of PurchaseOrder,

@api.model
def create(self, vals):
    print('Purchase Order, vals :', vals)
    company_id = vals.get('company_id', self.default_get(['company_id'])['company_id'])
    # Ensures default picking type and currency are taken from the right company.
    self_comp = self.with_company(company_id)
    if vals.get('name', 'New') == 'New':
        seq_date = None
        if 'date_order' in vals:
            seq_date = fields.Datetime.context_timestamp(self, fields.Datetime.to_datetime(vals['date_order']))
        vals['name'] = self_comp.env['ir.sequence'].next_by_code('purchase.order', sequence_date=seq_date) or '/'
    vals, partner_vals = self._write_partner_values(vals)
    res = super(PurchaseOrder, self_comp).create(vals)
    if partner_vals:
        res.sudo().write(partner_vals)  # Because the purchase user doesn't have write on `res.partner`
    return res

Please check create method code in this link.