Zhe Silong is a family owned workshop in Yiwu town. I have been to Zhe Silong's family twice. This workshop was founded in 2004. To be more exact, the owner's name is not called Zhe Silong. Zhe Silong is his business name for his brand. Zhe is his family name; Si(fourth literally), because he is the fourth kid of his family; Long means booming business. So he names his brand Zhe Silong.
Zhang Jiawang is a village and tea mountain's name. It is quite correct what Zhi Zheng described on the two differences in the two mountains. But both old and new Zhang Jiawang have bush, and new one takes high percentage of the bush amount.
Zhang Jiawang's old tea trees Maocha in 2009 are nicer and more expensive, compared to other tea mountains in Yiwu, such as Mahei, Luo Shui Dong, Qian Jia Zhai.
The other tea is from Bulang tea mountains and made by Pu Yun Cha Fang(a Taobao tea vendor, and make some of its own name Pu Er tea)