汽车行业报告中的术语解释？？

各位老师，本人刚刚开始接触行业报告，有以下问题请教：

在https://bbs.pinggu.org/viewthread.php?tid=924191&highlight=BMI的 BMI_China_Autos_Report_Q4_2010.pdf 一文中，反复出现了以下术语：

The numbers also revealed that several carmakers underestimated the cooling growth in the market and missed their sales targets for H110. Moreover, we expect sales in H210 will be impacted by the government's contradictory policy of offering incentives on car purchases while also implementing monetary tightening measures.

In H110, sales of Mercedes-Benz cars in China grew 122% to 59,600 units.

SAIC will be targeting the slightly larger end of the scale, with the launch of a light commercial
vehicle (LCV) in H211.

上面讲到H110，H210，H211等指的是什么意思呢？？还请大家帮助！谢谢！！

另外，下面的Q1，Q110，Q409等又是什么意思呢？

Land Rover's Q1 performance reflects the rapid growth of China's SUV segment, as it achieved record
sales for any one quarter with a 200% y-o-y increase to over 5,000 units. The Range Rover Sport played
no small part in the achievement, as its sales for Q110 rose 400%. In March alone, the Range Rover
Sport, Range Rover and Discovery all broke records for single month sales, with the company attributing
much of its success to new models launched in Q409. China is now Land Rover's third largest market.

还请大家指教！

已解决！
Q：季度。
H：半年度。

已解决！
Q：季度。
H：半年度。

Q：季度
H：半年度