According to this page, her husband is offering 50,000 pesos in reward money.
50,000 pesos is $2,726.67
http://www.nvinoticias.com/nota/8660/esposo-busca-china-desaparecida
it also goes on to say (through Google translate):
... cameras caught Jenny Chen, at 10:17 am on Monday, April 11 against the Peppa Pig cafe where [she] exchanged words with a man and then continued on his way towards Administrative City on federal highway 190 Christopher Columbus in Tlalixtac jurisdiction of Cabrera.
[Jenny's husband] said the [Chinese] embassy does not support in the search for his wife, because she is in the United States with a permanent visa and despite being married dede ago three years, the procedures of nationalization just 70 percent advance.
The Chinese community in Oaxaca offer 120,000 pesos to support Jonathan on his trip to Mexico (?):
The Chinese community based in Oaxaca ...offered 120 thousand pesos for economic support for the pursuit of his compatriot situation thanked Jonathan Reinharel, and no doubt that the authorities of the Asian country as soon as they hear the news support Chen Qoudan finding, which has already invested $ 200,000, including per diem and private investigations.
It also appears that Jenny decided 3 weeks before the trip to go:
"Three weeks before starting the journey, suddenly he told me to take new decisions in his life had to be herself, and which would travel through Mexico to get to Cuba, stopping at several locations throughout the country, including Cancun them, where would for a few days with me, "explained Jonathan.
First I'm hearing this, she purchased a phone in Mexico but did not give Jonathan the number:
Arriving in Mexican territory, the woman who worked as a cashier and then took a year, bought a cell phone, but did not give the number to her husband and only communicated with him via social networks when found connections Wifi.
Something about a woman selling tamales:
The Chinese reported that traveled to Ocotlan de Morelos to know the life of a woman selling tamales and similarly Capulálpam Mendez was in the Sierra Norte. Meanwhile, the young man who stayed last time Jenny south of the city, said Chen said he decided to move house because the man who gave him asylum, "he said strange things and had very dirty house, even with rats. "
http://www.nvinoticias.com/nota/8660/esposo-busca-china-desaparecida