As far as I understand this kind of technology, Chuwi eBook comes equipped with a screen that is both capacitive touch screen and electromagnetic touch screen, thus being able to support the kind of stylus that Hanwang ES4 is.
Chuwi Hi 8 Pro, on the other hand, has basic capacitive touch screen and then cannot support active stylus. So, no pressure sensitivity and bluetooth connection.
Hanwang AKA Hanvon offers a range of pens http://www.hanvon.com/products/components/products/pens.html but it seems like they couple them with digitizers, thus their offering is aimed at OEMs like Chuwi and not end users. Or they offer products like graphic drawing tablets.
This situation made me look into fine tip pens for capacitive screens:
http://www.amazon.com/dp/B00MGU8LIK?psc=1
http://www.amazon.de/gp/product/B00V7RKTF6/ref=s9_simh_gw_g23_i3_r?pf_rd_m=A3JWKAKR8XB7XF&pf_rd_s=desktop-2&pf_rd_r=1VD5G91BNTJWHTWRSY6X&pf_rd_t=36701&pf_rd_p=585296387&pf_rd_i=desktop
http://www.amazon.de/Adonit-ADJPDG-Dampening-Pr%C3%A4zisions-Tablets-Grau/dp/B00931K1QK/ref=pd_sim_23_10?ie=UTF8&dpID=31Jtuqy9ATL&dpSrc=sims&preST=_AC_UL160_SR160%2C160_&refRID=1FXXV457SZSMBHF7S5T2
http://www.amazon.de/gp/product/B014KSQ3XU/ref=s9_simh_gw_g147_i6_r?pf_rd_m=A3JWKAKR8XB7XF&pf_rd_s=desktop-2&pf_rd_r=1VD5G91BNTJWHTWRSY6X&pf_rd_t=36701&pf_rd_p=585296387&pf_rd_i=desktop#productDetails
DotPen is advertised as active stylus, but it’s not really active, it’s just using battery to mimic current from human finger.
Anyway, I was wondering if anyone tried anything like these and what the results are.